We are all a happier species with Weezer in our lives. It's a proven fact: Weezer is the gift that keeps on giving. And the fact that they just came out with their own line of celebratory Raditude Weezer Snuggies is even more joyful! Anyway, Rivers and co. stopped by It's On With Alexa Chung yesterday to rip through their new single, "(If You're Wondering If I Want To) I Want You To."

Particularly in full effect was Rivers Cuomo, untethered from his restrictive guitar, doing his best young Elvis Presley meets Ed Grimley dance moves.

Props also need to parceled out to guitarist Brian Bell who opted for the rarely seen tuxedo-with-Flying-V-guitar combo. Brian, we see you, and we salute you.