J.Lo's Best On-Duty Mommy Moments

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Jennifer Lopez turned 44 this week, on July 24, and the past year has been a thrilling one. She turned heads with an array of musical performances and gave contestants her two-cents as a judge for American Idol's 11th season. For many of these star-studded moments, she made sure her twins - Emme and Max, age 5 - joined her for the ride. - By Marisa Okano (Twitter: @okrissy)