Whether you love them or hate them, the Chipmunks proved yesterday that they still have plenty of box office power left in them, with their new movie Alvin and the Chipmunks: The Squeakuel opening to an extremely impressive $19 million yesterday, according to studio estimates. Estimates regarding how Disney’s The Princess and the Frog was affected by this are currently unavailable. Meanwhile, Avatar has been continuing its very strong run throughout the week, earning $16 million every day for the last three days.