The pop superstar confessed to the crowd at the Chelmsford, England event that he was performing with a hangover after partying with fellow V Festival headliner Rihanna at London nightclub TAPE until 5am on Saturday morning, and some disgruntled fans were clearly unhappy with the 22-year-old's set, taking to Twitter to accuse Justin of lip-syncing.

"Gutted! I love love love Justin Bieber but tonight at V he was miming. Not cool," one fan tweeted, with another writing, "Nah @justinbieber is miming at V Fest. I ain't paid (sic) £80 for a ticket to his tour to listen to his CD and see him run around the stage".

However, a representative for the Sorry singer has since responded to the allegations, insisting to Justin's performance included "no miming".

The gig featured Justin performing stripped down versions of his songs on acoustic guitar, a segment which prompted some fans to defend the musician against the miming accusations, claiming he definitely performed those sections live.

Justin's performance was not the only set at the music event's Chelmsford site to draw complaints from some audience members, as festival goers were also left waiting in the rain for Rihanna after she arrived on stage late for her headlining slot on Sunday (21Aug16).

Meanwhile, poor weather also caused technical problems for Sia, delaying her performance on Saturday by 15 minutes.

After performing in Chelmsford, Justin flew via helicopter to the festival's sister site in Staffordshire, England, where he performed another set on Sunday.