Paul McCartney has added a few new concerts in the U.S., and has tapped MGMT for at least a couple of them.

As previously reported, the former Beatle will play Washington Redskins' FedExField on Aug. 1 and will inaugurate the new Mets stadium, Citi Field, in New York on July 18 and 19.

Now, the singer-songwriter has added a third concert at Citi Field for July 21, with tickets having already gone onsale.

Additionally, he has scheduled two shows at Boston's Fenway Park on Aug. 5 and 6, with tickets up on Monday (June 29) at 10 a.m. via livenation.com, at the Orpheum Theatre Box Office or by calling 1-800-514-3849. Tickets are not available for purchase at Fenway Park.

Also there is a single date at Atlanta's Piedmont Park, dubbed The Green Concert, on Aug. 15. Tickets for that show also go on sale Monday. Macca has warned that more dates will be announced.

MGMT will open at the Fenway Park shows, because Paul McCartney and the weird Brooklyn duo just so definitely seem like they'd go hand-in-hand.

In other McCartney news, the songwriter posted his thoughts on the passing of Michael Jackson, with whom he's had a long history. "It's so sad and shocking. I feel privileged to have hung out and worked with Michael. He was a massively talented boy man with a gentle soul. His music will be remembered forever and my memories of our time together will be happy ones," read a statement on his website. "I send my deepest sympathy to his mother and the whole family and to his countless fans all around the world."

The two wrote music together, like on McCartney's "Say Say Say" and Jackson's "The Girl Is Mine," throughout the 1980s. However, they cut their friendship after Jackson outbid McCartney and Yoko Ono during an auction for much of The Beatles' back catalog.

Jackson sold half of that catalog to Sony in the mid-'90s and has reportedly left the remaining publishing rights to McCartney in his will.