Dizzee Rascal was on the bill to open day one of the Radio 1 Big Weekend in Derry’s Ebrington Square on Friday (May 24), but rather than just keep the performance to himself the rapper decided to treat the fans to a special guest: Robbie Williams! The two performed their new duet 'Goin’ Crazy' much to the pleasure of the audience, who were already being treated to some amazing weather and performances over the weekend.

The three day event, which began yesterday (May 24) and will end on Sunday (May 26), has already seen its fair share of surprises in addition to the Dizzee-Robbie hook-up, with troubles at Heathrow forcing two acts (Angel Haze and Aluna George) to pull out of the festival last minute, whilst drum and bass duo Chase & Status saw a way around the problem by hiring their own private jet to get to the three-day event.

Meanwhile, Rudimental, who were in Northern Ireland at the time but their equipment wasn't, had to borrow their kit from other performers in order to play their set. Producer Amir Amor said: "We borrowed guitars, bass, microphones, a bit of love! Everything we could. But the gig just blew us away."

The second day of festivities are set to kick off around midday today, with Biffy Clyro due to close day two. Two Door Cinema Club, Labrinth, Foals and Ellie Goulding are also due to play on Saturday. The final day of the festival will see such acts as Vampire Weekend, The Script, Olly Murs and Paramore perform, with Bruno Mars headlining.

See all the pictures from Day 1

Robbie Williams
Robbie Williams performing Day 1 Radio 1's Big Weekend

Dizzee Rascal
Dizzee Rascal performing Day 1 Radio 1's Big Weekend - Derry Northern Ireland