Wireless has quickly become a key live event in the summer gig calendar with headline slots from Morrissey, Jay-Z, Fatboy Slim and Counting Crows this year.

With five stages and more than 25 bands each day, the O2 Wireless shows gather an eclectic bill which also includes such names as Guillemots, Beck, Roisin Murphy and Mark Ronson for four days of great music. Each day of the event, from July 3 to 6, is a self-contained day-long festival.

Qthemusic.com has four pairs of tickets to give away for each day. But you can also buy the £45 day tickets here from Aloud.com. To tempt you here is a taster of the line-up:

Thursday, July 3: JAY-Z, plus Mark Ronson, Hot Chip, Roisin Murphy, Saul Williams, Lethal Bizzle, Elliot Minor and many more. Gates open: 2pm - 10.30pm

Friday, July 4: MORRISSEY plus Beck, The Wombats, The National, Guillemots, Dirty Pretty Things, New York Dolls and many more. Gates open: 2pm - 10.30pm

Saturday, July 5: FATBOY SLIM plus Deadmau5, Robyn, Underworld, Bootsy Collins, Cornershop, Sam Sparro and many more. Gates open: midday - 10.30pm

Sunday, July 6: COUNTING CROWS plus Ben Harper, Powderfinger, Goo Goo Dolls, Eddy Grant, Bowling for Soup, and many more. Gates open: midday - 10.30pm

To enter our competition, ust answer the simple question below, and remember to tell us which day you wish to see. This competition closes at 11.59pm on June 22. Please read the terms and conditions.