"Huge thanks to Justin Bieber and Pattie Mallette for an incredible night," Harrison also tweeted.
PHOTOS: Celebs with Bieber fever As for Mallette, she hasn't been dating in order to focus on her son's career.
They share two children together, son Joshua and daughter Taylor.
Well to put it mildly, she’s had a rough go at life….
That April, Chris was also linked to Season 17 contestant Ash Lee Frazier when they were seen at the Munch Mania Celebrity Basketball Game in Houston.
" Harrison split from his wife Gwen Harrison in May after 18 years of marriage.
But Andi admitted, “He’s actually a very good friend of mine.