We are down to the Final Four in our Ultimate Sports Celebrations Bracket! Two one seeds remain, but they'll face formidable competition from a pair of iconic sports moments.

Brandi Chastain's disrobing for the ages came into the tournament as a favorite to go all the way, and she punched her ticket to the semi-finals with a close victory over Bobby Orr's post Stanley Cup-winning leap. Kirk Gibson limping off the bench, swatting a game-winning homer, then slow-trotting around the bases with a bum leg and an emphatic fist pump will be tough to beat this time around.

Meanwhile, the Cal Golden Bears' 7,000-lateral kickoff return for a touchdown with the Stanford Band already on the field celebrating goes up against another unforgettable college football moment: Desmond Howard racing to the end zone, then striking a cocky and indelible Heisman pose.

Only you can decide where the bracket goes from here. So get out there and vote!

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Semifinal: Chastain vs. Gibson

1. Brandi Chastain, 1999 Women's World Cup: In front of 90,000-plus people at the Rose Bowl, Chastain became a Sports Illustrated cover subject and a national icon for women, telling them it was OK to celebrate like the men while ignoring the social undertones that came with her method of celebrating. If ever a sports photo captured a look of pure joy, this one was it.      

Brandi Chastain falling on her knees after scoring the winning penalty kick in the 1999 World Cup. Getty Images

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4. Kirk Gibson's fist pump after game-winning, pinch-hit HR in the 1988 World Series: Fully confess he probably got a higher seed just so we could hear Vin Scully's voice again (and again). And we have.      

Semifinal: The Band vs. Desomond Howard

1. Stanford Band on the field: "THE BAND IS OUT ON THE FIELD! HE'S GOING TO GO INTO THE END ZONE!!!" 

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8. Desmond Howard, Heisman pose: Simple, cocky, unforgettable. And it knocked off a No. 1 seed to get here along the way.

How we got here: The Brackets