AceShowbiz -

Nicole Scherzinger has made Conan O'Brien blush during a recent TV interview. The former lead singer for The Pussycat Dolls stopped by TBS' "Conan" on Monday, September 19 to promote "The X Factor (US)", and caught the late-night talk show host sneaking a peek at her cleavage.

The 33-year-old judge on the talent show was responding to Conan's inquiry about creator Simon Cowell when the TV host's eyes lingered a little too long on her boobs. Interrupting herself, she told him, "Focus, Conan," and gestured her hands toward her face, drawing laughter from the audience.

Embarrassed, Conan responded, "Let's be real here for a second. You didn't think I was going to look down there?" Trying to put the focus away from her cleavage, Nicole used the opportunity to explain about the appeal of Simon's "man boobs". Having described them as being "strong and perky", she added, "They speak to you."

The remark got Conan said in return, "Yours are screaming." After a brief pause to focus on the chat, the 48-year-old comedian admitted, "I don't know what to say any more." Still, it didn't take long for him to recover and mention about Nicole's hidden talent, asking her to show off her impersonation of Britney Spears which led to Nicole covering "Oops!...I Did It Again"