Shamed singer CHRIS BROWN is STILL pining over ex Rihanna - this time giving his broken heart the twitter treatment.

The disgraced singer - who was dumped after beating up his former girlfriend - has been posting tweets lamenting his loss (yawn!!)

He writes, "My heart is incomplete... The part that is complete is my love for fans, career, friends, family, God. But I'm missing someone or something."

He then posted a video on YouTube.com of his new single Changed Man, featuring clips depicting him kissing and laughing with Rihanna, before adding, "Sorry all, just one of those days."

Earlier this month, the 20 year old told newsman Larry King he is "definitely" still deeply in love with the Umbrella star, insisting he is finding it "hard" not being able to contact her.

Seriously, Chris, it's not gonna happen!