Jennifer Lopez First Vid Inside Vegas Show No Lip Sync, No Problems

1/19/2016 8:50 AM PST

Jennifer Lopez: First Video Inside Las Vegas Show ... No Lip Sync, No Problems

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J. Lo launched her Las Vegas residency with a preview show for family and friends that went off without a single hitch. 

Jennifer ran through her "All I Have" show at Planet Hollywood Monday night, and even though the front row was loaded with familiar faces -- like BFF Leah Remini, her mom and kids -- she nailed the routine.

Video from the VIP gig shows J. Lo hitting her marks (like a Fly Girl should) -- and, apparently, really singing instead of lip syncing.

Jen's performing on Britney Spears' off days in the same theater, and shows for the public begin Wednesday night.