Stars at Super Bowl 2012: Katy Perry, Madonna

01 of 19

A 'GIANTS' VICTORY

After showing her love for Tim Tebow, Katy Perry helps New York Giants cornerback Prince Amukamara celebrate his 21-17 win over the New England Patriots at Super Bowl XLVI on Sunday in Indianapolis.

02 of 19

CHEER SQUAD

Madonna gets her pom-poms out to perform her new single "Give Me All Your Luvin" with cheerleading rappers Nicki Minaj and M.I.A. during the Queen of Pop's Super Bowl halftime show Sunday.

03 of 19

POSED FOR VICTORY

30 Rock's Alec Baldwin pays homage to Tim Tebow by striking the Denver Broncos quarterback's trademark pose during the inaugural National Football League Honors in Indianapolis on Saturday.

04 of 19

THE 'HI' LIFE

Also at Saturday's NFL Honors: sports fan Taylor Lautner, who suits up for the pre-Bowl show at Indianapolis's Murat Theatre.

05 of 19

JUST DUET

Carrie Underwood and American Idol judge Steven Tyler team up for a tune at Saturday's CMT Crossroads Live, held at Indianapolis's Pepsi Coliseum.

06 of 19

SHE'S BALLIN'

Over in Sin City, a Clooney-less Stacy Keibler puts her fierce game face on while hosting a pre-Bowl bash at the Bank Nightclub at Las Vegas's Bellagio on Saturday.

07 of 19

BLUE MAN GROUP

Back in Indianapolis, White Collar's Matt Bomer plays point man to Chace Crawford at DIRECTV's Sixth Annual Celebrity Beach Bowl on Saturday.

08 of 19

WHAT A CATCH!

Also at Saturday's Beach Bowl, David Arquette gets down and dirty while going for a major pass.

09 of 19

SUITED UP

Before the big game, Jon Hamm and Chris Evans keep it dapper and dashing at NFL Honors and Pepsi's Rookie of the Year party Saturday in Indianapolis.

10 of 19

HOSTESS CLUB

Jenny McCarthy and fellow bombshell Carmen Electra buddy up with Jersey Shore's Jenni "JWOWW" Farley at the Leather and Laces event at Indianapolis's Regions Bank Tower on Friday.

11 of 19

HUDDLE UP

Also at the Leather and Laces event: Kendra Wilkinson and NFL player hubby Hank Baskett, who make it a sports-filled date night on Saturday.

12 of 19

STAR 'POW'-ER

True Blood hunk Joe Manganiello packs a punch at a Maxim pre-game bash at the Indiana State Fairgrounds on Saturday.

13 of 19

BEAUTIFUL 'VOICE'

Newlyweds Miranda Lambert and The Voice's Blake Shelton get in tune Sunday while performing "America the Beautiful" prior to kickoff at Super Bowl XLVI.

14 of 19

GOOD TIMES

Seal puts his heartbreak on pause Sunday for a fun-filled night with Michael Strahan and Lil Jon at a Super Bowl viewing party at Indianapolis hot spot Sensu.

15 of 19

MEET & GREET

Jimmy Fallon gets a handle on Smash star Katharine McPhee at Saturday's NFL Honors event before the big game, which aired promos for McPhee's new show, premiering Monday on NBC.

16 of 19

WATER BOY

Snoop Dogg tops off his MVP honors at Saturday's Celebrity Beach Bowl flag football match with a super-soaker surprise at Indianapolis's Victory Field.

17 of 19

FLAG BEARERS

Also at the Celebrity Beach Bowl on Saturday, Jordin Sparks shows her team spirit with Neil Patrick Harris.

18 of 19

PDA PAIR

Glee's Matthew Morrison cuddles up to model girlfriend Renee Puente on Friday at an Audi pre-game party held at Indianapolis's Conrad Hotel.

19 of 19

SPOUSAL SUPPORT

After losing another Super Bowl to the Giants on Sunday, Patriots quarterback Tom Brady shares a tender moment with supermodel wife Gisele Bündchen at Indianapolis's Lucas Oil Stadium.