"Rock with U" is a song by American singer Janet Jackson from her tenth studio album, Discipline (2008).

Saam Farahmand directed the long-take music video, which features Jackson having a party inside a club, with red and white rays of light entering the room.

And I talked about it to the papers, gay magazines, and it didn't wind up on the album with the cut-off date.

[12] The song opens with the line, "Strobe lights make everything sexier",[12] while it talks about an erotic proposition which was reportedly dedicated to the gay community.

[6][13] "Rock with U" was made available for sale through the US iTunes Store on February 5, 2008, along with a pre-order offer for Discipline.

Powers also wrote, "Playing on memory and melancholia, Janet's 'Rock With U' is nowhere as great as the original, but as a bit of intimate meta-pop it's utterly poignant.

Jackson has long been the bearer of her brother's secrets, and on this song she shows that she can still crave something other than sexual fulfillment.

"[12] Michael Arceneaux of PopMatters praised the track, calling it "a sensual gem" and "almost euphoric", effectively complimenting Jackson's "whispery delivery."

Arceneaux added, "It's a digitized form of pop music Janet should look into for future recordings.

[4] The accompanying music video for "Rock with U" was directed by Saam Farahmand and choreographed by Gil Duldulao.

[21] The long-take video begins with many people dancing on a hallway, until a girl comes and opens a door which leads to a room.

Then she goes to a hallway and enters a red-lighted room, accompanied by dancers, where entertainer Mimi Marks is seen.

During the May 28, 2023 concert of her tour, Janet Jackson: Together Again in Milwaukee, "Rock with U" was performed after being requested by one of her backup dancers.