Bravo touted an increase in its upcoming original programming slate as well as season premiere dates for a handful of its most popular series at Thursday’s television critics sesh in Pasadena.Rachelzoe

Season four of “The Real Housewives of New York” will debut Feb. 15 while the “Orange County” edition begins season six March 6. Net also confirmed new-season orders for “The Rachel Zoe Project,” “Flipping Out,” Work of Art: The Next Great Artist.” and “Top Chef Masters.”

Newly titled “Bethenny Ever After” will return for its second season Feb. 28.

Bravo topper Frances Berwick said she expects a 20% jump in originals in 2011. Net has the real estate to make the expansion after expanding to five nights of original programming in November.

Former “American Idol” judge Kara DioGuardi’s new competition series “Platinum Hit” – formerly titled “Hitmakers – gets off the ground in summer. She and Jewel will offer aspiring songwriters tips of having a career in the music business.

At the morning TCA panel, DioGuardi was reticent to talk about her “Idol” experience. She said she was writing a book on all things “Idol,” including behind-the-scenes details on how she was ultimately dismissed from the Fox juggernaut. Tome, from Harper Collins, will be out in the spring.

Other Bravo series set to preem in the new year include “Rocco’s Dinner Party,” “Million Dollar Decorators” and “Pregnant in Heels.”

At sister NBC Universal net Oxygen, Ryan Murphy and Dante Di Loreto have been signed on as exec producers for upcoming competition series “The Glee Project.” Michael Davies and Shauna Minoprio will also exec produce.

The winner receives a seven-episode guest starring role in the dramedy that, in its second season, remains Fox’s top-rated show.

Ten-episode “Glee Project” series begins in June. In February, Oxygen will being airing “Glee” repeats as a way to promote its own skein.

Oxygen will also launch freshman shows “All About Aubrey” (March 7), “Tori & Dean: Storibook Weddings (April) and “The World According to Paris” (spring).

In development at Oxygen is “Love Scouts,” where singles are matched up with hard-to-please clients, and “Dance Complex,” which looks at the Los Angeles professional dance scene.