Building a power hour playlist is a delicate art. You need songs that work in 60-second intervals (so no, you're not allowed to play "Free Bird") and you need to keep the party going for the full hour (so no, you're not allowed to play Bright Eyes at the 40-minute mark). Making things significantly easier for you is Ali Spagnola, a musician and all-around mensch who just launched a sweet new power hour app that does all the work for you.
Fresh on the app market, Ali Spagnola's Power Album: Party Hour Playlist Maker builds off your own tunes to make the mixes. Just filter your music by artist, genre, your iTunes playlists, or random shuffle and the app will cut everything down to a minute for you. Then you can add sound effects like a whistle or clown horn to let you know a song is up, customize the order and length, and get going. Other goodies included in the app are a live feed that lets you connect with other power hour champs and Spagnola's very own power hour album. Go download this game-changer for yourself through this site. We'll be over here, waiting for an app that magically makes us invincible at beer pong.