Jay-Z's official rocafella.com
Jay-Z metaphorically dissed Oasis at the Glastonbury Festival 2008, after Noel Gallagher said to the media Jigaa ain't supposed to take part at the fest.
Jay-Z got on the stage and mocked Noel Gallagher: Jay walked with an electric guitar hanged on him - while he wasn't playing, and than started sang off-key the Oasis hit "Wonderwall".
Than with a malicious smile he stop, chilled the enthusiastic crowd and continue with a special "99 Problems" performance while AC/DC's sample of "Back to Black" playing. check out Jay-Z Glastonbury live concert video
Later Amy Winehouse dissed Kanye West and said:
"Let's hear it for Jay-Z. The man has got bollocks to come here, and play the tunes ya don’t even know ya remember. Imagine if it was a cunt like Kanye West. ‘Cunts like Kanye’ - that should be his next album title."
in his blog, calling her "Whinehouse":
"THIS JUST IN... AMY WHINEHOUSE HATES ME!!! NOW I'VE REALLY MADE IT!!! LOL!!!!"