They're the hottest new band in the U.K. this very nanosecond, and the Vaccines are hoping to take over the U.S. when they play Austin's South by Southwest festival in March and drop their debut album, What Did You Expect From the Vaccines?, in May. To gear up for their invasion, the power-pop quartet has released a video for the lead single "If You Wanna." See what all the fuss is about below. The clip for "If You Wanna" is refreshingly spare and perfectly matches the simplicity of their guitar-powered pop: the group is captured rocking out on a cavernous soundstage, bathed in vivid hues of red, green, blue, and yellow. And when singer Justin Young sings, "It's alright if you wanna come back," you'll be set to hit the refresh on your browser. WATCH: The Vaccines, "If You Wanna"