5 Seconds Of Summer, Sharon Van Etten & More: Watch Their Late Night Performances

Peter Kramer/NBC
5 Seconds of Summer performs for the Summer Concert Series on the Today show in Rockefeller Plaza in New York on July 22, 2014.

Check out a rousing performance of "She Looks So Perfect" and much more

5 Seconds of Summer's debut album dropped earlier this week, so be prepared to hear plenty from the Australian heartthrobs in the weeks to come. The outdoor crowd at Jimmy Kimmel Live got in on the action, as Luke Hemmings and company stopped by for a two-song performance on Thursday night's show.

For their first song -- surprise, surprise -- 5SOS led with the hit single "She Looks So Perfect" and wove some tasty harmonies along the words "American Apparel underwear" into the chorus. And if you hadn't noticed, these kids can put on a show. Check out the video below to watch guitarist Michael Clifford hop the stage and get close to the fans near the barricade, before joining his bandmates for a synchronized leap at the start of the bridge.

5 Seconds of Summer Heading for No. 1 on Billboard 200 Chart

On song number two, Luke Hemmings breaks out the acoustic guitar and bassist Calum Hood (clad in a Night of the Living Dead tank) takes on more of the vocal duty:



Over on Letterman, indie singer-songwriter Sharon Van Etten performed "Every Time the Sun Comes Up" off her fantastic new album Are We There. The 2014 record debuted at No. 25 on the Billboard 200 -- her highest peak yet -- and with network performance like this, she's certainly on to bigger and better things… and some great harmonies. Check out the video below:



Before hitting the Newport Folk Festival this weekend, Wilco frontman Jeff Tweedy swung by The Tonight Show to share some new solo material before Jimmy Fallon's crowd. First up, "Summer Noon":



The alt-country favorite has a solo album called Sukierae coming Sept. 16 with an added point of interest -- his son Spencer is drumming in his backing band. Watch the father-son duo play a, shall we say, uplifting, track called "High As Hello":



And finally, Tori Amos was out promoting her new album Unrepentant Geraldines on Conan. The singer-songwriter brought out the grand piano for a performance of "Wild Way."

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