Practice your best Gwen Stefani impression and be as much of a hollaback girl as you want; you're going to need it for Rock Band this week. 13 songs from No Doubt's The Singles 1992-2003 are coming to the game, featuring some of their biggest songs from Tragic Kingdom, Return of Saturn, and Rock Steady. Tracks and pricing after the jump.

Activision will be releasing weekly DLC packs in December for Guitar Hero: World Tour, including tracks from Nirvana, The Eagles, Smashing Pumpkins, and a free Reggae Rock pack for Christmas.  You can look forward to a mix of older and newer tracks from all of the bands, including Nirvana's final single "You Know You're Right."

The full release schedule is after the break.

This week finally brings Rock Band over 500 songs with three weeks to spare! The nine singles up for offer range from artists like Children of Bodom and Squeeze to the musical stars of Nickelodeon, the Naked Brothers Band. Tracks and pricing after the jump.

Strap on your guitar, sharpen your broadsword, and unleash the fury; this week brings a Yngwie Malmsteen three-pack to Rock Band and Rock Band 2. Joining him are the Killers, Soundgarden, and Lamb of God for a total of nine tracks this week. As a holiday treat, the songs will be available for XBox 360 and PS3 on the same day. More details, tracks, and pricing after the jump.