Los Angeles - Lady Gaga's sexy performance on The X Factor has attracted over 200 complaints.
The Applause singer and her backing dancers appeared on the ITV show wearing flesh coloured bikinis, and she writhed around on a piano singing lyrics including "do what you want with my body" as she performed Venus and latest single Do What U Want on Sunday.
An Ofcom spokesperson said: "We will assess all the complaints received on this issue before deciding whether to investigate."
Some people voiced their upset at the performance - which came half an hour before the 21:00 watershed - with Jane Faram tweeting: "Unfortunately I'm watching the X Factor & so are lots of young impressionable kids. (sic)"
Joannna Parker echoed her sentiment writing: "Seriously this is the rotten level we've come to for our kids to watch this debauched shit on a Sunday night."
An ITV spokesperson defended Gaga's performance - watched by an estimated 10 million people - saying: "We do not believe Lady Gaga's performance was inappropriate for the family audience of the show, which has an established tradition of performances from the biggest music stars. She's well known for her highly individual style."
Gaga also attempted to make amends with Kelly Osbourne - whom she has been feuding with for months - while in London, presenting her mother, Sharon, with a birthday cake as a gesture.
Watch her performance on The X Factor here: