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Thursday at a four-day music festival: the interesting conundrum of coming early to catch some excellent first-day performances, versus taking that extra day off work. For those who made it happen, Firefly's 2017 lineup did not disappoint on Thursday, offering some very special moments for fans who came out and enjoyed an evening of lighter crowds and (mostly) newer music. Check out our rundown of the 5 best moments to come out of Thursday at Firefly.

1. Maggie Rogers sees her first festival
Some acts come to Firefly as festival veterans; for others, it's their first time taking over the big stage. For Maggie Rogers, who took the stage in a classic festival look of long braids and blue eye makeup, it was a first. The singer seemed awed by the audience stretched before her, as she entertained them with tracks from her recent debut EP, Now That The Light Is Fading. The crowd really got going for Rogers' cover of "Wannabe" by The Spice Girls, as well as her first big hit, "Alaska," which was celebrating its first anniversary.

2. K. Flay warming up the crowd for the weekend
K. Flay, the artist behind the dark song "Blood in the Cut," brought a surprisingly light set to get the Firefly crowd started for the weekend. Not to fall short of expectations, she came out dressed all in black, as well as donning a political message in the form of her shirt reading "Immigrants Welcome." K. Flay then played through a solid set of songs from her debut feature-length record, Every Where Is Somewhere.

3. O.A.R. show the newbies how it's done.
Now a classic act, O.A.R. frontman Marc Roberge recanted tales of just how long his band has been doing this. The oldest act on the billing Thursday, O.A.R. rocked through a series of hit songs recognized by even the youngest of fans, as well as their own unique spin on "No Woman, No Cry" by the legendary Bob Marley. The comfortable longevity of O.A.R.'s career radiated from their stage presence, offering a lesson for the nervous energy of some of the newer acts taking the stage at Firefly this weekend. Instead of jerking quickly between as many songs as possible, the band took the time to slow down and rock a jam session or two. 

4. Kaleo rocking on after an unexpected illness
Icelandic rock group Kaleo looked uncertain to even appear leading up to Firefly, having canceled a show in Richmond, Va. earlier in the week due to frontman JJ Julius Son's illness. The band announced a series of cancellations on social media that will run into August but still made their commitment to play Firefly, after having canceled in 2016 due to yet another ailment. You would've never known from watching them that any member of the band had suffered a hospital stay recently, as they rocked (and whistled) on like nobody's business.

5. Glass Animals close out an epic first day
Glass Animals have been running the gamut of festivals recently, coming into Delaware fresh off of a show at Bonnaroo. If you keep hearing about pineapples, it would be thanks to the band's gargantuan pineapple-shaped disco ball that set the stage for the band's disco-vibe show. Their cool English style was perfect for their late evening set, and watching them cut through one radio-friendly track after another makes it clear why so much buzz is surrounding these guys lately.