Complaints over Aguilera TV routine
Broadcasting watchdog Ofcom is considering whether to investigate racy scenes shown in the X Factor final.
The show saw US star Christina Aguilera perform a suggestive routine with scantily clad dancers.
Rihanna also gave a raunchy performance when she stripped off her gown to parade around the stage in a bikini in Saturday's first part of the final.
Both ITV and Ofcom have each received around 1,000 complaints about the pre-watershed scenes.
An Ofcom spokesman said: "We are assessing the complaints but are not currently investigating the show."
An X Factor spokesman said: "We are confident that the performances given by our guest artistes on Saturday were appropriate for the show."
Christina's routine was the most explicit of the night, with her dancers wearing only stockings, knickers and bras.
A TV insider said what was broadcast on the show, which ended with Matt Cardle taking the X Factor crown, was no different to what is aired on music TV channels during the day. Section 1.3 of Ofcom's broadcasting code states that "children must be protected by appropriate scheduling from material that is unsuitable for them".
The controversy came after it emerged that Take That changed their song at the last-minute on the X Factor final because Simon Cowell decided that the routine, featuring 50 backing dancers dressed as riot police, was inappropriate.
Simon is said to have decided that the costumes were too political for a family show, coming so soon after the clashes between police and students over university tuition fee increases.