If you're a member of a fandom, you know how intense the obsession can get. But what do celebs obsess over?
Sports! So many celebs with a devoted fan followings have their own devotions as well, and it's pretty often a team. Here are some of your favorite fandom's sporty fandoms.
Chris Pratt, Seattle Seahawks & Mariners
While Pratt's character on "Park and Recreation is a huge Indianapolis Colts fan, the man himself great up near Seattle and loves the Super Bowl champion Seahawks and Seattle Mariners.
Jennifer Lawrence, Louisville Cardinals
J-Law grew up in Louisville, KY, and is a big fan of the University of Louisville Cardinals. She even narrated a hype video for them this summer. Her "Hunger Games" co-star Josh Hutcherson is a fan of the Kentucky Wildcats, AKA one of Louisville's biggest rival. No doubt that made for some healthy trash talking on set.
Lady Gaga, New York Giants/Knicks/Yankees
Justin Bieber, Toronto Maple Leafs
Bieber is a bit of sports polygamist, rocking everything from Miami Heat to LA Kings to Barcelona gear. But the Canadian is a hockey fan first, and roots for his hometown Toronto Maple Leafs. He's also good buddies with boxer Floyd Mayweather, because of course.
Beyonce, Houston Rockets
Macklemore, Seattle Seahawks
Daniel Radcliffe, New York Giants
Bradley Cooper, Philadelphia Eagles
Rocket Raccoon played an obsessive sports fan in "Silver Linings Playbook," which hit close to home: the Philly native is a big Eagles fan, along with other Philly natives like John Legend and Questlove.
Selena Gomez, San Antonio Spurs
Katy Perry, LA Lakers & New England Patriots
Taylor Swift, Pittsburgh Penguins
Demi Lovato, Dallas Cowboys
Demi is a Texas native and the daughter of a former Dallas Cowboys cheerleader, so you know she roots for them Cowboys. She even Tweeted her support of the Boys signing DE Michael Sam, the first openly gay player ever drafted into the NFL.
Zac Efron, New Orleans Saints & LA Lakers
The "High School Musical" star is probably a Wildcats fan at heart, but in real life he's a big New Orleans Saints fan and a Lakers fan to boot. He's also an English Premier League fan, in case you ship Efron with any of your favorite Brits.
Nicki Minaj, New York Giants
Drake, Toronto Raptors
Rihanna, LA Lakers & Liverpool FC
Rihanna is frequently courtside for the Lakers, but it's not just for show. Given that she's from Barbados, a former British colony and soccer-mad island, she's also a big soccer fan and supports Liverpool so much, she wants to buy the team.
Iggy Azalea, LA Lakers