Whats this movie ( a rock band movie )?

whats this movie its about a band, and i think the drummer leaves so they need a new one, and the have try outs in the garage and they finally find a drummer. and they do practise on online and one time it did it naked and i think on of the band members sister films it ( you cant see anything) and then the sister puts it online and it gets like tons of hits. then when ever the drummer goes to the store people say like " hey its the naked drummer " and near the end of the movie they get big and the band goes to massive concerts but at the end they drummer meats his band he used to play in so he cant vs them but the he finally comes to his senses and they beat the band because the other band used pre made music like the lip song it so yeah. Anyone know