The host announced his move on Thursday's show, where it was revealed that Ripa's husband, Mark Consuelos, will replace him.
Boss, Ellen's DJ and TV partner, died in December at age 40.
The country legend said she was the first one approached for Shelton's spot 12 years ago.
Swarm follows a young woman named Dre (played by Dominique Fishback) who is obsessed with a fictional pop star. See the first photos here.
Old enough to drink, old enough to become the next reality singing star.
Jordan died at the scene of a car crash on Oct. 24.
Her "Shotgun Wedding" co-star Lenny Kravitz made a surprise in-studio appearance on Wednesday night.
Singer Patrick Stump picked up the guitar slack for Wednesday night's performance.
"Oh, it's coming," she told a fan.
She won best performance by an actress in a drama television series on Tuesday night.
