Oprah Starts No. 1 Twitter Trending Topic After Debuting OWN's New Sunday Lineup

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In an effort to draw viewers, Winfrey spends all day Sunday Tweeting with her fans and posting videos.

Oprah Winfrey kicked off a "Tweet-a-thon" Sunday night to promote OWN's new Sunday lineup -- and quickly started the No. 1 trending topic: #OprahLiveTweet.

Winfrey released a number of candid videos online over the weekend asking viewers to tune into Season 25: Oprah Behind the Scenes on Sunday. (It had previously aired on Friday nights.)

She also turned the camera on herself by airing the first episode of a two-part Master Class episode about her life. Part two will air next Sunday.

Also actively Live-Tweeting Sunday night: Gayle King, Oprah's executive producer Sheri Salata and OWN chief creative officer Lisa Erspamer.

In an interview with The Hollywood Reporter, Oprah said she would utilize the Web more to connect with her viewers and even for inspiration for OWN programming ideas.

The last episode of her talk show airs May 25.