What is the songs playing on the radio when Becca (from Pitch perfect) walks into the radio station?

The song played in the radio studio when Beca first entered was "Keep You" by Wild Belle.

Pitch Perfect (2012) is an American musical comedy film directed by Jason Moore with screenplay by Kay Cannon. The main cast members are Anna Kendrick (Beca), Skylar Astin (Jesse), Ben Plat (Benji), Brittany Snow (Chloe), Anna Camp (Aubrey), Rebel Wilson (Fat Amy), Adam Devine (Bumper), Ester Dean (Cynthia Rose), Alexis Knapp (Stacie), Hana Mae Lee (Lilly), John Michael Higgins (John), and Elizabeth Banks (Gail). The movie was distributed by Universal Pictures and has PG-13 ratings.

"Pitch Perfect" grossed $65 million domestically, and was also a hit on the music charts, where the film's soundtrack peaked at No. 3 on the Billboard 200 and has sold over 713,961 units so far, according to Nielsen SoundScan.