[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2010/images/03/10/art.biden052109.gi.jpg caption="Joe Biden said Friday he doesn't have a good track record with making predictions."](CNN) - Vice President Joe Biden predicts that the Netherlands will win Sunday's World Cup championship game in South Africa, but admits his track record may not be that great.
"I think the Netherlands are going to win, but what the hell do I know? I thought LeBron was going to stay," Biden told Jay Leno Friday, in his first appearance on NBC's "The Tonight Show" since taking over as vice president a year and a half ago.
The vice president was pointing to a comment regarding NBA superstar LeBron James that he made a week ago in Ohio while campaigning for the Democrat's Senate nominee in that state. James announced Thursday the he was leaving the Cleveland Cavaliers to play with the Miami Heat.
Leno joked about Biden's tendency to speak his mind and make public gaffes. Biden said he warned then fellow Democratic Sen. Barack Obama about that, before signing on as Obama's running mate in the 2008 presidential election.
"I told the president two things when he asked me to do the job. I said, 'Just two conditions, Mr. President. I'm not going to wear any funny hats, and I'm not changing my brand.' And I kept my promise," Biden told Leno.
The late night talk show host also questioned the vice president about Friday's spy swap with Russia, in which the U.S. sent ten accused spies back to Moscow for four in return. Leno asked if the U.S. got a raw deal.
"We got back four really good ones," Biden told Leno. "And the ten, they've been here a long time, but they hadn't done much."
Asked about the return of one of the ten, attractive alleged Russian spy Anna Chapman, Biden joked "let me be clear. It was not my idea to send her back."
Also Friday while in Los Angeles, the vice president headlined a fundraiser for Sen. Barbara Boxer of California for the second straight day. The event was held at the home of Tom Rothman, co-chairman of Fox Filmed Entertainment, one of the largest movie studies in the country. According to a pool report, the event was expected to raise some $200,000 for Boxer. The three term Democratic senator faces a tough re-election bid this year against Republican nominee Carly Fiorina, the former CEO of Hewlett Packard.
Biden closed his comments at the fundraiser by saying that "California is coming back, America is coming back and Barbara Boxer is coming back."
Follow Paul Steinhauser on Twitter: @psteinhausercnn