Kelly Osbourne. Inset: Matthew Mosshart
Celebrity Monitor/Splash News Online
08/28/2013 AT 06:00 AM EDT
is a good sport.
Matthew Mosshart accompanied the TV personality on Saturday afternoon as she made her way through BeautyCon 2013 at Hollywood's Siren Studios, where thousands of mostly young female guests got sneak peeks at the latest in beauty and lifestyle products.
Sporting her signature lavender 'do, E!'s Fashion Police
co-host happily posed for photos with Mosshart and acted "bubbly and in love," according to an onlooker at the NYX Cosmetics and StyleHaul-sponsored event.
"Kelly mentioned if she could have one beauty invention, it would be condensing her energy into a perfume bottle for daily use," the observer tells PEOPLE.
Mosshart, on the other hand, was overheard talking about the couple's engagement
, saying the wedding will not be set for another year yet.
And while he didn't disclose a possible location plan, the source says, "He gushed about how nice it has been being in California with Kelly full-time, since he made the decision to move there with her permanently."
– Dahvi Shira