50 Cent slammed for bad taste Blue Ivy joke

50 Cent has been attacked for mocking Beyonce and Jay-Z's newborn baby, Ivy Blue. Photo / Supplied

50 Cent has been slammed by hip-hop fans for joking about Beyonce Knowles and Jay-Z's new baby.

The couple welcomed their first child, daughter Blue Ivy, into the world on Saturday and are thought to have left the New York hospital Beyonce was recovering in last night.

Not long after the birth was reported, 50 Cent took to his Twitter feed to joke about the pair's new arrival. The rapper posted a picture of a baby's body with Jay-Z's face superimposed, with an accompanying caption.

"Yal play to much congratulations to JAYZ and Beyonce BABY #BlueIvyCarter IS GEORGOUS @50cent (sic),'' he wrote on his page before adding: "You bull shitting they will pay a million dollars for a picture of that baby lol trust me."

Many fans took to the social networking site and internet forums to show their disdain at the mocking picture.

"lmfao shit is just wrong on so many levels WTF (sic)," one user wrote.

50 Cent has famously offended Jay-Z in the past, after vowing to steal Beyonce from him.

He also said the star was "only famous for marrying Beyonce" and "outside the States and hip-hop circles no one really knew who he was until that".

50 Cent has been using his Twitter page to vent a lot of frustration of late.

The hip-hop star made an apology to the bosses of his record label after he accused them of leaking one of his songs.

- AAP