Jordin Sparks keeps “forgetting things” because she her brain is "almost full".

The singer has revealed her frustration at mixing up dates, names and numbers. Jordin went on Twitter today to express her annoyance with her memory difficulties.

“My brain = 'start up disk is almost full' I keep mixing up dates, numbers, ages & forgetting things. Oy! :/,” she wrote on Twitter before later adding “So sore...must get into bed. Goodnight loves! Owiiiieeeee! >_o (sic).”

Jordin's comments come as she prepares for the release of her movie Sparkle, a remake of a 1976 film of the same name about three teenage sisters who form their own group. She stars alongside Whitney Houston who shot the picture shortly before her death.

Jordin discussed her grief at Whitney’s passing at the recent 5th Annual Essence Black Women in Hollywood Luncheon, where she performed in the late star’s honour.

“It comes in waves,” she said. “I'm definitely trying to process it a little bit.

“I'm really glad I got to work with her. It was a gift that I got to know her.”

Jordin is is now supporting her friend Leah Labelle with the release of her new single.

Leah, a former American Idol contestant, has released the song, Sexify, which is produced by Pharrell Williams and Jermaine Dupri.

Jordin has encouraged Leah on Twitter saying, “@LaBelleMusik I love you. Really, I got all teary eyed listening. Im so happy this is all happening for you! Its your time! :) (sic).”