Radio 1's Greg James reckons the line-up for the station's Big Weekend in Glasgow is its "best ever".
One Direction, Pharrell Williams and Kings of Leon are all on the bill, with Coldplay and Katy Perry headlining the event.
Up to 50,000 partygoers will be at the free festival on Glasgow Green on 24 and 25 May.
The weekend gets under way on Friday evening with 14,000 people attending a big dance event.
Greg, who hosts Radio 1's weekday afternoon show, said: "I really believe this is the best one ever for my tastes.
"You've got Jake Bugg and One Direction on the same stage, that doesn't really happen anywhere else.
"Coldplay are my favourite ever band and Katy Perry is my pop star crush."
Ticket scammers warned
Meanwhile, Radio 1 says it could cancel some tickets - which are free - after some appeared for sale online.
Radio 1 said: "Those offering tickets for sale are breaking the terms and conditions they agreed to during the booking process and we reserve the right to cancel them."
Bastille, Lorde and Lily Allen will perform across the weekend as well as Tinie Tempah, Rita Ora and The Vamps.