Hayley Erbert counted down the top 20 things she loves about husband Derek Hough in honor of his 40th birthday. "Happy 40th Birthday to my favorite person ever," Erbert, 30, wrote via Instagram on ...

The snaps showed Allen smiling as she hugged a friend, chatting to guests ... a photo of her cake on Instagram, penning: “HAPPY 40th BIRTHDAY SCHMILLY BON BILLY!! We love you Lily.

“Happy birthday to my best friend @therealangellocsin love youuuu mars,” she added.

“Happy 40th Birthday to my favorite person ever ... branding his longtime friend a “young ass.” (Chmerkovskiy turned 39 in March.) On his own Instagram page, Hough revealed on Saturday ...