James Bay, Gary Clark, Jr. + Zella Day Brought The Heat To Lollapalooza 2015

Check out these Best of the Fest highlights from Lollapalooza 2015.

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"Hold Back The River" singer and You Oughta Know alum James Bay rocked the stage at Lollapalooza 2015 this past weekend. Host Ellie Lee caught up with James for a 30-second Best of the Fest Q&A about his go-to karaoke song, the first record he ever bought, and what he'd do for a living if he wasn't a singer. Spoiler alert: He'd still be an artist.

Grammy award-winning singer and all-around cool dude Gary Clark, Jr. put his knowledge of Lollapalooza, Chicago, and his own musical influences to the test in a little game of trivia. Find out how well he did in the following clip.

"Hypnotic" singer-songwriter and Beatles fan Zella Day got some major bucket list points at Lolla when she got to perform at the same festival as musical idol Paul McCartney for the second time this summer. Get to know Zella and check out her selfie game in this final clip from Best of the Fest.