John Summit and Dom Dolla headlined the second annual Up in the Sky music festival on Friday and Saturday at Buttermilk Ski Area in Aspen. Empire of the Sun performs as part of the Up in the Sky music festival on Friday, Aug. 7, 2026, at Buttermilk Ski Area in Aspen. Austin Colbert/The Aspen TimesFans enjoy the music as Empire of the Sun performs as part of the Up in the Sky music festival on Friday, Aug. 7, 2026, at Buttermilk Ski Area in Aspen. Austin Colbert/The Aspen TimesEmpire of the Sun performs as part of the Up in the Sky music festival on Friday, Aug. 7, 2026, at Buttermilk Ski Area in Aspen. Austin Colbert/The Aspen TimesPeople dance as the band Fcukers perform as part of the Up in the Sky music festival on Friday, Aug. 7, 2026, at Buttermilk Ski Area in Aspen.