Rocker Steven Tyler gave Jennifer Aniston a belated birthday treat on Tuesday when he called in during a her radio chat with Los Angeles DJ Ryan Seacrest to sing to her.

Aniston, a lifelong Aerosmith fan, gasped and giggled as the singer crooned a birthday greeting to the actress to the tune of his band’s monster hit “I Don’t Wanna Miss a Thing.”

The actress was promoting new her movie “Wanderlust” on the show when Seacrest, the host of “American Idol,” introduced Tyler, a judge on the TV talent show.

He sang, “I could lie awake just to say happy birthday…”, prompting a thrilled Aniston to coo, “This is not happening… This is so great.”

She and Tyler then exchanged mutual adorations on air, with the superfan telling the rocker, “Oh my God, I’m so happy you’re on Idol. I’m obsessed.”

Tyler then revealed he was calling from a recording studio, where he and his Aerosmith bandmates are working on new material, prompting the actress to ask, “Will you throw the name Jennifer in any one of those songs – any one of ‘em?”

The two stars then talked about love, with newly engaged Tyler congratulating the birthday girl on her romance with actor/writer Justin Theroux and she responded, “It’s in the air… 2011 was a good year for love.”

As Seacrest wrapped up the birthday treat and Tyler headed back to work, Aniston said, “That will be my memory forever… That was a good one, you guys.”