Los Angeles (E! Online) - When exchanging words with the media about Kanye West, 50 Cent never vowed to quit performing in Europe if his fellow rap star outsold him, did he?

Regardless, the confident emcee has canceled three upcoming European appearances, including stops at the MOBO Awards and Vodafone Live Music Awards in London on Wednesday and a Friday performance for MTV in Germany.

The rapper's reps simply attributed the cancellations to a change in his schedule. Meaning, it presumably has nothing to do with the fact Fiddy's Curtis debuted at number two behind West's Graduation on the U.K.'s album chart and is headed for the same slot on the Billboard 200 when the final numbers are made public on Wednesday.

According to the latest sales figures, Curtis has sold about 603,000 copies, 178,000 fewer units than Graduation, to arrive at number two.

It's possible that 50 Cent, whose real name is Curtis Jackson, is just too tired right now to cross the pond. The Get Rich or Die Tryin' star wrapped up his five-night 5 Borough Tour Sunday at the Rum Jungle in his hometown of Queens, New York.

To the packed club's delight (which was diminished when people realized that the $50 bills being tossed from the stage had Fiddy's face on them), 50 was joined last night by fellow G-Unit artists Young Buck, Tony Yayo, Lloyd Banks and Young Hot Rod, as well as by Remy Ma and hip-hop veteran LL Cool J.

Despite the busy NYC touring schedule, Fiddy found time Friday to call radio station Hot 97, the Big Apple's frequent sparring ground for rappers on the make, to accuse Def Jam of buying extra copies of Graduation to inflate its numbers, an allegation that West's label has not yet responded to.

Meanwhile, despite the fact that Fiddy said he would retire from cutting solo records if West bested him this time around, the artist reportedly already has a dozen tunes that didn't make it onto Curtis that have been earmarked for his next album, Before I Self-Destruct, due out in 2008.