Holker will be a judge alongside Jojo Siwa and Maksim Chmerkovskiy.
Lythgoe announced his departure from the show earlier this month following Paula Abdul's sexual assault allegations against the longtime judge.
This year, the best reality television came from shows we'd nearly given up on.
Celebrate the TV anniversary of the time ballroom Benji beat out contemporary Travis for the season 2 'So You Think You Can Dance' crown.
Celebrate the TV anniversary of the time Lady Gaga turned a televised dance competition into an exercise in dodging footwear.
Celebrate the TV anniversary of the time Wade Robson choreographed the greatest zombie dance since "Thriller."
Celebratethe TV anniversary of the prettiest dance between two statues ever.
Celebrate the TV anniversary of the day we finally got to have Twitch in our lives.
Celebrate Celine Dion's birthday the way the universe has always intended: with So You Think You Can Dance videos.