Superstar Beyonce is among the headliners for this summer's V Festival in Chelmsford in August.
19-year-old Cher Lloyd had a glass bottle filled with urine thrown at her during her performance at the V Festival.
Stars perform at V Festival's twin sites at Hylands Park in Chelmsford and Weston Park in Staffordshire.
Police are making enquiries after a blogger accused former X Factor judge Tulisa Contostavlos of punching him and hurling drunken abuse at V Festival in the early hours of Sunday.
Vas Morgan claims the star charged towards him in a "drunken and angry state" and that she punched him in the eye before "hurling abusive threats".
Contostavlos' representative said: "Tulisa strongly denies assaulting Mr Morgan - she specifically denies punching Mr Morgan."
Essex Police have confirmed that they received an allegation of assault "alleged to have occurred at around midnight on Saturday at the V Festival".
"We are making further enquiries," a spokeswoman said.
The reigning first diva of pop Beyonce closed the Weston Park leg of V Festival to screaming crowds.
Thousands flocked to the main stage in Staffordshire to see the star, who was sporting a new blonde crop.
Fans waited 25 minutes before the star began a hits-laden set including Single Ladies, Baby Boy, Crazy In Love and Love On Top before finishing with a rendition of Whitney Houston's I Will Always Love You and Halo.
Fans Natalie Moore, 19 and her boyfriend Adam Johnson, also 19, from Staffordshire said: "She was very good and put on a good show. Lots of dancing, which was good."
V Festival - held simultaneously at two venues in the UK - Weston Park in Staffordshire and Hylands Park in Essex - has got underway.
As well as the headliners Beyoncé and Kings Of Leon, this year sees the likes of The Saturdays, The Script, Stereophonics, Jessie J and Olly Murs hit the various stages at both venues to wow the crowds as the summer of British music draws to a close.
X Factor judge Tulisa Contostavlos moaned about the "bloody British weather" as the rain started pouring during her V Festival performance.
The singer sang on the main stage at Hylands Park in Chelmsford, Essex, on Sunday just as the rain began to fall.
The N-Dubz singer wore a pink short-sleeved jacket, polka dot corset and patterned trousers as she performed solo material, including her new single Live It Up.
As lightning struck, Tulisa - who played V Festival's Weston Park site in Staffordshire on Saturday, told fans:
"Look at this bloody British weather."
The sun came back by the end of Tulisa's set during the second day of music at the festival.
Also performing at the event, now in its 17th year, are Sir Tom Jones, Happy Mondays and Snow Patrol.
– Police spokesman
At this stage the death is being treated as unexplained and police are keen to speak to anyone else at the V Festival who may have information or may have seen the male during the evening.
A 22-year-old man who died at V Festival in Staffordshire has been named as Timothy Brockhurst from Stoke Heath in Shropshire.
The cause of death is still unknown and a post-mortem examination will take place early next week. The death is not being treated as suspicious.