Rob Lowe Celebrates His Son's 21st Birthday in Las Vegas -- Complete with Champagne and Sparklers!

What happens in Vegas...! Rob Lowe traveled to Las Vegas this past weekend to celebrate his son John Owen's 21st birthday -- and alcohol, cake and sparklers were involved! To document the birthday bash, the Grinder actor took to Instagram and shared photos and videos from the group's Sin City weekend getaway. "Even the fountains are pumped for the @johnnylowe and the 21st #birthday bash!! #vegas," Lowe captioned a video of the Bellagio Fountains. Lowe, 52, also shared a photo of himself sitting ...