(source: Twitter)

Brooke Burke-Charvet is "in shock" after being let go from her co-hosting job on ABC's Dancing With the Stars, a source tells Us Weekly. After working on the show for seven seasons, Burke-Charvet, 42, wasn't notified of the decision until "just a few hours before it was announced. She had no idea." 

Replacing Tom Bergeron's co-host is Fox Sports reporter Erin Andrews. And according to Us' insider, the blonde stunner's following factored into the casting decision.  

"Everyone loved [Brooke], but the execs wanted a whole new show," the source revealed. Adding that Andrews' "young male following" was appealing to the network. "They're desperate for those viewers," the source added.