CHRISTINA AGUILERA AND KATIE HOLMES

Christina Aguilera

Pop star Christina Aguilera and Hollywood star Katie Holmes have signed to star together in a new movie. The duo will work together in the family drama Humboldt Park, which will begin shooting in February, just a few weeks after Aguilera is due to give birth to her first child. A source says, "(Holmes) is trying to prove she can do more than fluffy popcorn movies", and starring alongside Aguilera "shows she’s willing to take risks".