

Paul McCartney (Photo by Janette Pellegrini/Getty Images) / Justin Timberlake (Photo by Buda Mendes/Getty Images)

Paul McCartney and Justin Timberlake will take over Hollywood Boulevard on consecutive nights next week to kick off the new season of Jimmy Kimmel Live.

On Monday, September 23, Paul McCartney will make his first appearance on the late-night ABC show. He'll do an interview, then perform for what is expected to be a record-breaking crowd.

The next night, September 24, Justin Timberlake will take the stage to perform songs from his new album and chat about his new movie, Runner Runner. (We can't seem to go a day around here lately without mentioning his co-star in the thriller, Mr. Ben Affleck.)

The concerts are free, but you've still got to sign up for tickets ahead of time.

The two-night event will close down Hollywood Boulevard from Highland Avenue to Sycamore Avenue, so be warned and avoid if you're not a fan of either performer.

It doesn't sound like they'll be dueting, but stranger things have happened.

Both concerts will be live-streamed via MySpace. McCartney's concert will be available immediately after the West Coast airing of the episode. Timberlake's concert will be available on September 30, to coincide with the release of his album.