Celebrities loooooove Marilyn Monroe. Lindsay Lohan, Gwen Stefani, Christina Aquilera, and Scarlet Johansson all channel her on a regular basis. And last night, Jennifer Lopez became the latest to make like the original blond bombshell when she slinked onto “Lopez Tonight” in a floor-length dress and blond wig to sing “Happy Birthday” to George Lopez, just like Marilyn did for John F. Kennedy on his 45th birthday. Sure, it’s cute when she says, “Calm down, birthday boy. Take a seat and let me do my thing.” But the Marilyn act is just getting so old. Next.