Jessica Jarrell's "Up and Running" provides listeners with three-and-a-half minutes of sheer dance-pop liveliness and guilty-pleasure appeal. The young California singer-who is opening for Justin Bieber on his arena tour and guested on his "My World 2.0" duet "Overboard"-sets soft, plainspoken vocals against a hurried disco beat. At 15, Jarrell is hardly of age to hit the clubs, but she sounds perfectly at home singing about partying until the sun rises. Her voice sounds eerily similar to Rihanna's on the Barbadian star's early singles, which only adds to the song's appeal. Gym Class Heroes frontman Travie McCoy modernizes the song-which harks back to the '90s-with his guest spot, adding some needed edge to what might otherwise sound like a retread.