Jennifer Lopez serenades special friend

Music and movie star Jennifer Lopez had a special surprise for Sean (Puffy) Combs' 30th birthday.

According to MTV, Jennifer couldn't make it to Puffy's big day because she was in Los Angeles shooting "The Cell".

But she did manage to give a glamorous birthday wish to her special friend. Jennifer got dolled up like Marilyn Monroe with a blonde wig and evening gown and croon "Happy Birthday" for Puffy.