“The Star Next Door” is from Queen Latifah (pictured) and “The Biggest Loser” exec producer Dave Broom. (Ethan Miller)

 One hopes to fill a huge void in the TV landscape with a singing competition; another takes us into the world of ballet, and the third documents the hard-partying employees of a hot Miami hotel.

 The three new shows – “The Star Next Door,” “Breaking Pointe,” and ‘The Catalina” – join the already announced musical-chairs reality series “Oh Sit!” on the network’s summer schedule.

The lineup represents CW’s biggest commitment yet to original summer programming which, CW president Mark Pedowitz explained, should improve the network’s circulation during those critical months when CW is promoting its new fall schedule.

 In “The Star Next Door,” from Queen Latifah and “The Biggest Loser” exec producer Dave Broome, celebrity mentors including Gloria Estefan and country crooner John Rich, travel to aspiring singers’ homes to prepare them to compete live on stage, presumably in Los Angeles.

 “Breaking Pointe,” from BBC Worldwide Productions, looks at “the gritty dog-eat-dog world” of Ballet West, in Salt Lake City, Utah.

 And “The Catalina” gives CW viewers a peek at “the young, wild staff” of The Catalina hotel in Miami’s South Beach.

 The previously announced “Oh Sit!” involves 20 competitors racing through five physically demanding obstacle course-style eliminations, to claim a chair, to the sounds of a live band.