John Legend's fiancee has lashed out at Jennifer Lopez's uptight security team.

Top model Chrissy Teigen claims she was asked to stop watching John perform at the Sound of Change concert in London on Saturday night (01.06.13) and leave the side of the stage by the 'Dance Again' singer's team before Jennifer's ''supreme arrival''.

The 27-year-old beauty vented her frustration in a furious rant on Twitter, writing: ''I won't get into it but Jennifer Lopez' people need to calm the f*** down.

''I love Jennifer Lopez. But as I am sitting and watching John perform, I don't need her people to lay down the j-lo laws.''

Chrissy insisted that she is still a fan of Jennifer despite being ordered around by her team.

She wrote: ''She shall still be my face and hair idol. Her people can kick rocks. I have never once been asked to leave an area for an artist's supreme arrival. Maybe I should carry around a horn and streamers.''

She later admitted she was extremely disappointed by Jennifer's entourage and their diva-like attitude.

She said: ''I'm bummed because I really loved her dammit. Anyhow, moving on.''

Jennifer and John, who popped the question to Chrissy in December 2011, were among the A-list stars to lend their support to the charity gig - which was organised by fashion house Gucci's Chime for Change female empowerment campaign - at London's Twickenham Stadium.

Beyonce, Madonna, Florence + the Machine, Jessie J and Rita Ora also performed at the event.

Hollywood stars Blake Lively, Ryan Reynolds, James Franco, Zoe Saldana and Jessica Chastain appeared on stage to support the cause.