Kate Hudson & Jay-Z
The Oscar-winning actress and Grammy-collecting music mogul are lucky charms for A-Rod in his Yankees playoff victory over the Twins.
See more celebs playing the field in our Stars & Their Sport Studs gallery!
January Jones & Jeff Gordon
The Mad Men star steps out of the '60s to greet the dashing driver at NASCAR's modern-day Price Chopper 400 at Kansas Speedway.
Will Ferrell, Will Arnett & Jordin Sparks
The funnymen and American Idol show their love of tennis at Arthur Ashe Kids' Day at the U.S. Open. The Wills competed against each other in a hilarious doubles match with pros Andy Murray and Andy Roddick.
Jake Gyllenhaal & Reese Witherspoon
Looks like hoops fan Jake has found another courtside partner to help him cheer on his hometown Lakers.
Kid Rock
The "Amen" singer probably uttered a less spiritual four-letter word as he watches his native Detroit Red Wings lose to the Pittsburgh Penguins during game five of the NHL Stanley Cup Finals in Michigan. Fellow rocker Chad Kroeger (not pictured) is also in attendance. Well, he is Canadian.
David Beckham
How great is it to be Becks? The soccer stud takes his boys courtside to watch the Lakers take on the Nuggets in the opening round of the NBA playoffs.
Jessica Simpson & Tony Romo
Texas fans may start extending Jessica’s jinx powers to basketball. She and Cowboys quarterback Tony watch the Dallas Mavericks mount a huge comeback but miss a last-second shot and fall to the Los Angeles Lakers. Too bad the jinx has since extended to their relationship.
Keri Russell & Shane Deary
Keri snags courtside seats for her and hottie contractor husband at the New York Knicks-Dallas Mavericks game. Nice perk if you can get it!
Ashlee Simpson & Pete Wentz
The New York Knicks notch a rare win at Madison Square Garden, perhaps aided by the presence of stars like Ashlee Simpson, Pete Wentz, Alan Cumming (plus one) and LL Cool J.
Hilary Duff
We're not sure if attending hockey games is a perk or a drawback to dating New York Islanders center Mike Comrie, but Hilary makes the best of it.
Spike Lee & Jackson, Brad Pitt & Maddox
It's a boys' night out for these famous fathers and sons in front-row seats at the Yankees-Mariners game. Derek Jeter even stops by to give the kids a ball and bat.
Hilary Swank
She may be a Washington State native, but Hilary clearly reps for New York, as she cheerfully dons a NY Mets cap while her team plays against the Dodgers in Los Angeles.
Victoria Beckham
Acclimating to Hollywood obviously hasn't been a problem for Posh, who looks right at home in her Dodger gear as she throws out the opening pitch for the L.A. team.
Nick Lachey & Vanessa Minnillo
Currently on-again, off-again couple Vanessa and Nick show their solidarity, at least on the game field, as they cheer on the USC Trojans against Notre Dame at L.A.'s Memorial Coliseum.
For more A-list athletic action, check out our Stars & Their Sport Studs gallery!