Earth, Wind & Fire's frontman spilled details on the whirlwind road to the band's surprise performance during Sabrina Carpenter's Lollapalooza set.

Sabrina isn't the only Lolla headliner to have surprised fans with a top-tier special guest during their set. As previously reported, Olivia Rodrigo, whose GUTS era has now seemingly come to a close, tapped into the wide world of Weez by bringing out Rivers Cuomo and company.