Nicole Scherzinger's Heathrow Airport Arrival After "X-Factor" Breakdown

Perhaps feeling the sting of a rocky relationship, the brunette beauty erupted in tears at "X-Facotr" Factor bootcamp when a contestant sang Cher's song "Believe." Reportedly, filming had to be stopped for several minutes while she wept.

A recent report that the 34-year-old singer's boyfriend, F1 racer Lewis Hamilton brought several women back to his hotel room to party may have been the cause of the meltdown.

An onlooker told the Mirror "She was clearly very upset and it's little wonder as it's been a torrid few days for her. But she's a true pro and just got on with things."

Last night Miss Scherzinger tweeted "Thank u Liverpool for an amazing boot camp. Was intense but wow, God Bless the talent here in the UK!"