After getting braces and glasses, Kacey Simon falls from the popular group. She forges unlikely friendships with the members of the band Gravity 4 featuring Stevie, Zander, Kevin and Nelson. As lead singer, Kacey takes the newly renamed Gravity 5's musical success to new heights while igniting a musical rivalry with The Perfs featuring her former best friends and fellow performers, Molly and Grace.

Kacey has a crush on a senior boy, Dean Hollis. Just as she's about to get a date with him, Molly pulls a prank, leaving Kacey humiliated. Gravity 5 pulls a revenge prank on The Perfs, but it backfires, leaving Kacey and Zander's hands glued together. The situation threatens to sabotage Kacey's big date with Dean.

Kacey is determined to outshine Molly at the school dance. She sends Stevie undercover to find out what Molly will be wearing, but when Stevie realizes she's being used, she comes up with a plan of her own. Meanwhile, the boys have a bet; whoever doesn't get a date to the dance has to wear a dress to it. After Zander slips up and a girl turns him down and goes with Kevin, he is devistated. Kacey goes to the dance with Nelson to make Zander wear a dress. Stevie goes back to Gravity 5, and Grace is once again the second Perf. At the dance it turns out that Stevie had planned to have Kacey and Molly wear the same dress, which works. Unfortunatly, Zander is also wearing the same dress.

Kacey misses sitting at her old lunch table and will stop at nothing to take it back from The Perfs.

Kacey gives away too many smoothies at her part-time job, getting herself and Stevie fired.

The Perfs have front row seats for a Cee Lo Green concert; Gravity 5 can't get tickets. Masquerading as arena employees, Gravity 5 sneaks into the concert through the back way, but when security catches on, they have to run for their lives. Cee Lo Green decides he wants Gravity 5 to tour with him. But there's a misunderstanding - the star only wants Kacey. Gravity 5 is happy for Kacey, but the Battle of the Bands is approaching and now they have no singer.

The Perfs have front row seats for a Cee Lo Green concert; Gravity 5 can't get tickets. Masquerading as arena employees, Gravity 5 sneaks into the concert through the back way, but when security catches on, they have to run for their lives. Cee Lo Green decides he wants Gravity 5 to tour with him. But there's a misunderstanding - the star only wants Kacey. Gravity 5 is happy for Kacey, but the Battle of the Bands is approaching and now they have no singer.