Star Tracker: Mario Lopez, Penelope Cruz, Christina Aguilera…

Mario Lopez shows off his new baby girl, Gia, in the new issue of OK! The first time dad tells the magazine that he isn’t worried about fatherhood because he comes from a “big, loud Mexican Catholic family… so I’m used to a bunch of babies [being] around.”

Penelope Cruz’s sister, Spanish film star Monica Cruz, has been called to aunt duty early. It seems Penelope’s baby bump is showing more than producers of Pirates Of The Caribbean: On Stranger Tide expected and her sister has been hired as her body double.

—Perez Hilton is reporting that Christina Aguilera will perform a song from her upcoming movie, Burlesque, at the AMA's on November 21st.

Victoria Justice talked to about her new scary made-for-TV movie The Boy Who Cried Werewolf costarring Brooke Shields.

—"Oh Santa," the first single off of Mariah Carey's new album Merry Christmas II You  debuted at #1 on the new Billboard Holiday Digital Songs chart. The second song is her classic, "All I Want for Christmas is You."