X Factor
Joe McElderry, Leon Jackson, Same Difference, The X Factor Finalists, Alexandra Burke, Steve Brookstein, Shayne Ward, Leona Lewis, Susan Boyle, Jedward, Maria Lawson & Cher Lloyd
Songs: Hallelujah (Alexandra Burke) - A Moment Like This (Leona Lewis) - Wishing on a Star - Heroes (The X Factor Finalists) - Summertime (Leona Lewis live)

Xanadu (film)
Soundtrack (1980)
Siehe auch: Xanadu (musical), Olivia Newton-John, Cliff Richard & Electric Light Orchestra
Songs: Don't Walk Away (Electric Light Orchestra) - Xanadu (Olivia Newton-John & Electric Light Orchestra) - Magic (Olivia Newton-John) - Suddenly (Olivia Newton-John & Cliff Richard) - All Over the World (Electric Light Orchestra)

Charli XCX
Charlotte Aitchison
Songs: I Love It (& Icona Pop) - Out Out (& Saweetie, Jax Jones & Joel Cory) - Girls - Vroom Vroom - Break the Rules

XG
Songs: Shooting Star

XXXTentacion
Songs: Moonlight - Changes - Sad! - Falling Down (& Lil Peep) - Hope