The songstress sang her biggest hits on front of thousands.
UPDATE: Watch Adele's entire headlining performance at the Glastonbury music festival over the weekend.
"Rumor Has It"
"I'll Be Waiting"
"One and Only"
"Water Under the Bridge"
"Don't You Remember"
"Send My Love (To Your New Lover)"
"Rolling in the Deep"
"Make You Feel My Love"
"Set Fire to the Rain"
"When We Were Young"
"Someone Like You"
EARLIER ON MARCH 18:
BreatheHeavy Reviews Adele Live at London’s O2 Arena
According to NME, Adele said: "I wanted to do it last year but my record wasn't ready. And to the people who say I am too boring to headline, you're more fucking boring for moaning about me headlining."
Adele previously stated she would never perform Glastonbury because "the crowds are too big," adding "I don't know if I could do it."
Looks like Adele found her confidence.
Adele will take her 25 Tour to Glastonbury in June.Ticket holders for the Glastonbury music festival are having a hard time wrapping their head around the opportunity to see Muse, Coldplay and Adele in one single weekend. The festival, which takes place this year from June 22-26, announced two of the three Pyramid Stage headliners already – with Muse playing on the Friday night and Coldplay closing Sunday night. They were tight-lipped about Adele, but she spilled the beans at her latest 25 show at the O2 arena in London Friday evening.
As @Adele just announced live on stage in London, she will headline Saturday night at this year's Glastonbury Festival!— Glastonbury Festival (@GlastoFest) March 18, 2016