Enrique Iglesias Rules The 'Late Night Lineup'

Like all good things, summer vacations have to end eventually. All the talk show hosts are back to work this week (save for the Comedy Central duo of Jon Stewart and Stephen Colbert, who are pre-empted for the next few days), which means that the guest lists are gigantic. David Letterman kicks off the week strong with a visit from Sylvester Stallone (plugging his upcoming action epic "The Expendables") and a musical performance from Robyn on Monday (July 19). Sheryl Crow stops by for a song on Tuesday (July 20), while Friday (July 23) will see Paul McCartney swing by for a performance.

"The Tonight Show" counters with visits from Kiss (Monday), the Black Eyed Peas (Tuesday), "Eclipse" rockers Metric (Wednesday, July 21), 3OH!3 (Thursday, July 22) and the Gaslight Anthem (Friday). That is an incredible week of music, augmented by interviews with Miami Heat star Dwayne Wade (Monday) and "Charlie St. Cloud" hunk Zac Efron (Tuesday). Over on "Jimmy Kimmel Live," the ABC host will welcome N.E.R.D. and Jay Baruchel (Monday) and "Mad Men" star Jon Hamm (Tuesday) on a fairly low-key week.

It's good to have Jimmy Fallon back, as "Late Night with Jimmy Fallon" always has the most satisfying and eclectic music line-ups, and this week is no exception. Jam icons Widespread Panic (Monday), Australian legends Crowded House (Tuesday) and rapper Rick Ross (Friday) will all throw down on Fallon's stage this week (the idea of a Ross/Roots collaboration is mouth-watering). Another great collaboration? Travie McCoy and Bruno Mars, who will team up on "Lopez Tonight" on Tuesday. Lopez will also welcome Enrique Iglesias on Thursday, further cementing his reputation as a host who has excellent taste in musical guests.

What talk show appearance are you most looking forward to this week? Let us know in the comments!