the point is the song is jessies idea and jessies lead single. it has 3 leads to give it a girl group anthem vibe ala marmalade. Jessie was nice enough to share the lead credits, y'all are mean. and to answer the question no, the song sucks and its only appeal is being a 3 way diva-off
Bang Bang was obviously meant for Jessie. If you look closely at the single's cover, her name is even spelled out in a different typeface from Ariana and Nicki's. Her voice is the pits in the song though, I cringe so much when she's screeching during the bridge ("bad girl to blow your mind").