Courtesy of Box Office Mojo:
1) TMNT with $24,255,205, averaging $7,799 over 3,110 theaters (1st week)
23) Happy Feet with $395,313, averaging $976 over 405 theaters ($197,207,309 total; 19th week)
59) Arthur and the Invisibles with $22,218, averaging $383 over 58 theaters ($14,929,879 total; 13th week)
U.S. box office actuals: March 23-25, 2007