Lady Gaga, Foo Fighters and The Black Eyed Peas are among the artists confirmed to play the main stage at this year's Radio 1 Big Weekend.
The two-day festival, Europe's biggest free ticketed event, will take place at Carlisle Airfield on 14 and 15 May.
Plan B, Tinie Tempah and Nicole Scherzinger will also perform.
The announcement was made by DJ Scott Mills in front of pupils and staff from Trinity School with Katy B performing.
Tickets
Bruno Mars, Chase & Status, Ellie Goulding, Jessie J, My Chemical Romance, The Script, Katy B, Professor Green, The Wombats, Taio Cruz and Olly Murs are also confirmed to appear.
Lady Gaga - who will release her second album Born This Way in May - will headline the main stage on Sunday 15 May.
It will be the New York singer's first performance in the UK since completing her Monster Ball tour in London in December 2010.
In a message to Radio 1 listeners she said: "I'm so excited. I've been planning and rehearsing for so many months now.
"This event is so important to me. Thank you for all of your love and support."
Foo Fighters will round-off Saturday's action by topping the bill.
The line-up for the In New Music We Trust Stage has also been confirmed. The Strokes and Swedish House Mafia will headline.
Wretch 32, The Joy Formidable, Cage The Elephant, Everything Everything, Panic! At The Disco, Nero and Friendly Fires will play on the Saturday.
Joining them on the Sunday is Pulled Apart By Horses, Yasmin, The Vaccines, Two Door Cinema Club, Devlin, Noah & The Whale and Magnetic Man.
In the past Big Weekend has visited locations including Swindon, Preston and Maidstone.
Rihanna, Cheryl Cole and Florence & The Machine were the main attractions at last year's weekender in Bangor, north Wales.
Tickets for Radio 1's Big Weekend are free and registration opens on Thursday 31 March at 8.15am and closes at 7pm on Thursday 7 April.
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Stefani Joanne Angelina Germanotta (born March 28, 1986), better known by her stage name Lady Gaga, is an American pop singer-songwriter.
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