April 20, 2009 2:30 pm “17 Again” Leads Box Office The Zac Efron comedy debuts in the top spot over the weekend. “State of Play” opens in second and “Monsters Vs. Aliens” remains in third. US & World Videos 2:03 Does Shakira still believe in love following Gerard Piqué split? 1:36 O.J. Simpson's cause of death revealed 25:57 WATCH: ‘Changing Climate' highlights the Philly-area residents who are combatting climate change 2:36 Super dad makes Mario-themed obstacle course for son's birthday 4:17 How the Philadelphia Union became the sustainability champs of the MLS