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11 January 2012, 13:01
The G-Unit rapper has posted a fake picture of the singer's baby on Twitter.
50 Cent looks set to upset Beyonce and his long-time rival Jay-Z after posting a spoof photo which he claims shows the couple's newborn baby online.
The rapper's picture, which he posted on Twitter, sees Jay-Z's head superimposed on the body of a baby.
In a message accompanying the photo, 50 Cent gave no indication that the picture wasn't real and instead kindly congratulated the pair on the arrival of Blue Ivy Carter last weekend.
"Yal play to much congratulations to JAYZ and Beyonce BABY #BlueIvyCarter IS GEORGOUS," he wrote on Twitter.
50 Cent has famously had an on-off rivalry with Jay-Z and has previously claimed that the 'Empire State Of Mind' rapper only became really famous after he married the former Destiny's Child star.
Meanwhile, Beyonce and Jay-Z are understood to have taken Blue home from the New York hospital where she was born on Saturday.
See the spoof picture that 50 Cent has posted online below (Picture: Twitter).