Darius Rucker, who recorded five albums as the lead singer of Hootie and the Blowfish, now had a successful solo career as a country singer. His single "Wagon Wheel" reached No. 1 on the country charts. Rucker is nominated for Single of the Year, Song of the Year and Vocal Event of the Year at the 49th Academy of Country Music Awards (April 6, CBS at 8 p.m. ET) for the song.
Rucker is a big-time sports fan and is picking Florida to beat Louisville in the title game.
Florida Georgia Line, who is nominated for Duo of the Year, Album of the Year (Here's To The Good Times), Single of the Year (Cruise), and Event of the Year (with Nelly), is going with Michigan State to cut down the nets.
Chris Young, who was ACM Male Vocalist of the Year nominee of the Year in 2013, is picking Louisville to beat Syracuse.
Chen, who also hosts the hit summer reality series Big Brother, likes Florida over Arizona
Tyler, the former host of E! Entertainment's Talk Soup and actress on Ghost Whisperer, CSI and 24, is picking the Gators to beat Arizona in the title game.
Gilbert may be best known for her role as Darlene Conner in the long-running hit series Roseanne, for which she earned two Emmy Award nominations, and her reocurring role of Leslie Winkle on The Big Bang Theory. She is going with the Gators over Louisville in the championship game.
The cast of NCIS: Los Angeles is getting in on March Madness, but can't come to an agreement on which team will win the championship. LL Cool J, who is also a two-time Grammy Award-winner, likes Florida to reach the final, but lose to Kentucky in the title game. Chris O'Donnell, who is a Golden Globe Award nominee, is going with an all-west final with Arizona beating UCLA.
Daniela Ruah is one of the few celebrities going with the undefeated Shockers. She likes Wichita State to beat Michigan State in the championship game.
Brian Dietzen, who stars on the original NCIS, is another celebrity who is all about Florida. Dietzen likes the Gators to beat Louisville in the championship game.
The CBS This Morning anchors are also getting in on the bracket mania as co-anchor Norah O'Donnell is going with an old school matchup in the final with North Carolina to beat Duke in the final.
CBS' new comedy Friends With Better Lives, which premieres Monday, March 31 at 9 p.m. ET, has set up their own challenge where you can compete with the stars of the show.
Brooklyn Decker, who appeared on the cover of the SI swimsuit issue in 2010 and co-starred with Adam Sandler in the movie Just Go With It, is one of the co-stars of the new show. Decker is picking Michigan to knock off North Carolina in the final.
Co-star James Van Der Beek, who starred in Dawson's Creek for six seasons and most recently Don't Trust the B in Apartment 23, is going with the all-shocker final, picking St. Joseph's to beat Saint Louis in the championship game.
Even some sports analysts and athletes are getting in on the action.
You can watch Washington Capitals captain Alex Ovechkin fills out his bracket and picks No. 1 seed Virginia to win it all.
Former Steelers coach and current analyst for the NFL Today, Bill Cowher is also picking Florida to win the title over Louisville.
Two newcomers to The NFL Today set this year are former Ravens and Jets linebacker Bart Scott and former Chiefs and Falcons tight end Tony Gonzalez. Scott is picking Michigan State to win, while Gonzalez is going with Arizona over Kansas in the final.
Steve Tasker, who played with the Bills, and is currently a game analyst for CBS' NFL coverage, is one of the few who believes in Wichita State to reach the final. But in the end he has the Gators beating the Shockers.
Rich Gannon, who is also a game analyst for CBS' NFL coverage picks Louisville to defend its title, beating Michigan State in the championship game.
Peter Kostis, who has been with CBS since 1992 and currently in the on-course golf reporter, likes Arizona to beat Florida in the final. Kostis recently announced he is cancer free after surgery for colon cancer.
Some other celebrities:
Joe Mantegna, actor, producer, writer and director, best known for his roles in box-office hits such as The Three Amigos and The Godfather Part II, currently stars on CBS' drama Criminal Minds. He is one of the few celebrities that likes Syracuse to beat Arizona.
Two members of the Harlem Globetrotters Big Easy and Flight Time, who are currently competing on the The Amazing Race All Stars, differ on who win will the NCAA Tournament. Big Easy is going with Florida over Wichita State, while Flight Time is taking Arizona over Syracuse.
Let's Make a Deal model Tiffany Coyne has one of the most surprising celebrity brackets of the bunch, picking No. 16 seed Weber State to beat Harvard in the final.
PJ Byrne, who stars as Nelson Cassidy on CBS' Intelligence is picking Florida to win it all.
Linsey Godfrey, who portrays Caroline Spencer on CBS' The Bold and the Beautiful, is going with UCLA to beat Duke in the final.
Nyambi Nyambi, who plays Samuel in the CBS sitcom Mike & Molly, is going with Arizona to knock off Michigan State in the final. Cast mate Reno Wilson is on the Gators bandwagon, picking No. 1 Florida to beat Wichita State.
Scott Clifton, who plays William Spencer III on The Bold and the Beautiful, might end up with one of the greatest brackets ever as he has UCLA, Harvard, San Diego State and Manhattan in the Final Four. Clifton likes Harvard to win the championship over Manhattan.
Some of Clifton's cast mates are also going with the craziest brackets out there as Jacob Young, who plays Rick Forrester on the hit soap, has Oregon beating Delaware in the title game.
Lawrence Saint-Victor, who plays lawyer Carter Walton, has Texas over Stephen F. Austin in the title game, while John McCook, who portrays original cast member Eric Forrester, has UCLA over Duke in his final, but is also picking two No. 16 seeds to reach the Sweet 16 in Albany and Coastal Carolina. Ashlyn Pearce, who plays Aly Forrester, is going with Virginia over BYU in the final.
The Bold and the Beautiful isn't the only soap involved in picking brackets as Christel Khalil, who plays Lily Winters on CBS' The Young and The Restless, is picking Arizona to beat Florida in the final. Meanwhile, cast mate Greg Rikaart, who plays Kevin Fisher, is on the Michigan State bandwagon, picking the Spartans over Arizona and Redaric Williams, who portrays Tyler Michaelson, is going with Florida, picking the Gators to beat Duke.
Karla Mosley, who portrays Maya Avant, is going with Villanova over Michigan.