*In an effort to boost viewership of her cable channel OWN, Oprah Winfrey spent all day Sunday tweeting with her fans and posting videos to promote the 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, which 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.