Charli XCX exceeded expectations with a raucous Coachella set that included off-the-wall energy and guest appearances from her buds Lorde, Billie Eilish ... arrived Eilish in her most Adam Sandler ...

She famously ditched her signature slime green strands and reemerged as a blonde bombshell just one week ago. And Billie Eilish is clearly still smitten with her new look as she took to Instagram ...