United Kingdom, March 14 -- Sir Mick Jagger gets "anxious" about the mood of his audiences.

The Rolling Stones frontman made a surprise appearance at the Oscars earlier this month to present the Academy Award for Best Original Song and the ceremony's host Conan O'Brien was amazed when the 81-year-old rocker asked about the atmosphere in Los Angeles' Dolby Theater before stepping out on stage.

Speaking on his 'Conan Needs a Friend' podcast, the comic said: "I'm sitting there, stage left, and I'm looking at my monitor. I'm just aware of a presence to my left, and I kind of just look over and it's this guy.

"I immediately see that it's Mick Jagger, who I've never met. Mick Jagger looks at me and he starts nudging me.

"And in kind of a co...