Billy Joel jokes about ex Christie Brinkley dating John Mellencamp in concert

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Part of Billy Joel's in-concert appeal (he holds the record for most solo shows at famed venue Madison Square Garden) is that he drops the occasional amazing aside. After performing a song inspired by an ex, for example, he'll typically deadpan, "And then we got divorced." It's scripted, sure (he does the same joke at most shows), but still more honest than most pop stars who go on stage and belt out love songs about people they broke up with.

Well, Joel got in an even better one at a recent concert. After singing "The Longest Time" -- a hit about ex-wife Christie Brinkley -- at a recent MSG concert, Joel told the audience, "And now she's dating John Mellencamp." [via Us Weekly].

Brinkley and Mellencamp have been seen on dates together since early September, and it seems Joel - who's still on good terms with his ex - is fully aware of her love life.

As for the rock legend, Joel recently married his fourth wife in a private Fourth of July ceremony on his Long Island estate. They welcomed a daughter into the world in August.

At the very least, his new wife will never be the subject of post-song asides, because Joel has permanently retired from writing new material.

See photos of Joel and Brinkley:

19 PHOTOS
Billy Joel and Christie Brinkley
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Billy Joel jokes about ex Christie Brinkley dating John Mellencamp in concert
(EXCLUSIVE COVERAGE) Billy Joel and Christie Brinkley pose backstage at the long running hit musical 'Chicago' on Broadway at The Ambassador Theater on June 11, 2011 in New York City. ***Exclusive*** (Photo by Bruce Glikas/FilmMagic)
Singer Mariah Carey, musician Billy Joel and model Christie Brinkley attend The Police Athletic League Honors Mayor David Dinkins on June 12, 1991 at The Plaza Hotel in New York City. (Photo by Ron Galella, Ltd./WireImage)
Musician Billy Joel and model Christie Brinkley attend the wedding of Tommy Mottola and Mariah Carey on June 5, 1993 at St. Thomas Episcopal Church in New York City. (Photo by Ron Galella, Ltd./WireImage)
Musician Billy Joel and model Christie Brinkley attend the After Party for Billy Joel's Television Concert Special 'Matter of Trust: Billy Joel in the USSR' on June 2, 1988 at the Hard Rock Cafe in New York City. (Photo by Ron Galella, Ltd./WireImage)
Model Christie Brinkley and musician Billy Joel attend 'A Divine Celebration' Cathedral of St. John the Divine Honors Billy Joel on December 5, 1990 at the Cathedral of St. John the Divine in New York City. (Photo by Ron Galella, Ltd./WireImage)
Musician Billy Joel and model Christie Brinkley attend The Walden Woods Project Benefit Concert After Party on October 21, 1991 at the Tavern on the Green in New York City. (Photo by Ron Galella, Ltd./WireImage)
Musician Billy Joel and model Christie Brinkley on September 15, 1988 dine at the Columbus Cafe in New York City. (Photo by Ron Galella, Ltd./WireImage)
Model Christie Brinkley and musician Billy Joel attend the First Annual Rock and Roll Hall of Fame Induction Ceremony on January 23, 1986 at the Waldorf-Astoria Hotel in New York City. (Photo by Ron Galella, Ltd./WireImage)
Model Christie Brinkley, musician Billy Joel and daughter Alexa Ray Joel attend The Moscow Circus Opening Night Performance on September 15, 1988 at Radio City Music Hall in New York City. (Photo by Ron Galella, Ltd./WireImage)
Model Christie Brinkley and musician Billy Joel attend the 'Speed-the-Plow' Opening Night Performance on May 3, 1988 at the Royale Theatre in New York City. (Photo by Ron Galella/WireImage)
Musician Billy Joel and model Christie Brinkley attend the Second Annual Rock and Roll Hall of Fame Induction Ceremony on January 21, 1987 at the Waldorf-Astoria Hotel in New York City. (Photo by Ron Galella/WireImage)
Model Christie Brinkley and musician Billy Joel attend the Second Annual Rock and Roll Hall of Fame Induction Ceremony on January 21, 1987 at the Waldorf-Astoria Hotel in New York City. (Photo by Ron Galella/WireImage)
NEW YORK - APRIL 25: (L-R) Christie Brinkley, Alexa Ray Joel and Billy Joel attend the premiere of 'Last Play At Shea' during the 2010 Tribeca Film Festival at the Tribeca Performing Arts Centre on April 25, 2010 in New York City. (Photo by Jemal Countess/Getty Images for Tribeca Film Festival)
NEW YORK CITY - JUNE 5: Musician Billy Joel and model Christie Brinkley attend the wedding of Tommy Mottola and Mariah Carey on June 5, 1993 at St. Thomas Episcopal Church in New York City. (Photo by Ron Galella, Ltd./WireImage)
Christie Brinkley and Billy Joel during Christie Brinkley and Billy Joel Sighting - November 2, 1989 at Langan's Brasserie in London, United Kingdom. (Photo by Tom Wargacki/WireImage)
Billy Joel and Christie Brinkley during 30th Annual Grammy Awards at Radio City Music Hall in New York City, New York, United States. (Photo by Ron Galella/WireImage)
Billy Joel and Christie Brinkley (Photo by Ron Galella/WireImage)
NEW YORK, NY - CIRCA 1983: Christie Brinkley and Billy Joel circa 1983 in New York City. (Photo by Sonia Moskowitz/IMAGES/Getty Images)
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