Other acts included in the line-up for the annual music festival in London include Calvin Harris, 5 Seconds of Summer, Maroon 5, Kasabian and David Guetta.
Kiesza, Jungle, Beck, Robert Plant, Chrissie Hynde and Blondie complete the first batch of acts.
Performances will take place across the whole month of September - that's 30 days of good music!
'Stay With Me' singer Sam will hit the stage on 9 September, while 'Happy' hitmaker Pharrell will headline on 10 September.
The iTunes Festival, which is retuning for its eighth year, will be held at the iconic Roundhouse in Camden.
The music event is free and UK residents can win tickets by entering an official ballot, which can be accessed via the iTunes store.
Those unable to bag a ticket can still watch the gigs, as they'll be available through live streams.
More than 60 artists will take to the stage, so we can't wait to find out who else is on the bill for the music festival!
Last year's festival was jam-packed with some of our favourite pop sensations including Lady Gaga, Katy Perry, Robin Thicke, Jessie J, John Legend and Ellie Goulding.
To see the line-up and apply for tickets, please visit: www.itunesfestival.com.
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