Lady Gaga was hoping to perform with Mark Ronson at Britain's Glastonbury Festival but she didn't have the time.

The Poker Face singer was rumored to be teaming up with Mark for a surprise appearance at the music event this weekend (25-26Jun16) after she was reportedly spotted on the Worthy Farm site.

The Uptown Funk producer has now confirmed they had been planning for her to play with him and Tame Impala frontman Kevin Parker, but they couldn't fit it into her schedule, as she is due to attend an event with the Dalai Lama on Sunday (26Jun16).

“She was going to come but she had to go and meet the Dalai Lama or something crazy," Mark tells Britain's Sun on Sunday newspaper. "She was close to coming and hanging out in Shangri-La but it didn’t quite happen.”

Gaga, who last played Glastonbury in 2009, is due to appear with the spiritual leader for an onstage conversation at the Conference of Mayors annual meeting in Indianapolis, Indiana.

She touched down in the city on Saturday (25Jun16) and wrote on Twitter, "As I prepare to meet His Holiness, the @DalaiLama I envision tomorrow--Where there is no work more important than the work of love.

"Landed in Indianapolis to meet @DalaiLama I'm grateful. Imagine if we all knew that level of kindness was in the distance before we met."

Lady Gaga's surprise appearance hasn't been the only Glastonbury rumor - it was reported that Rihanna will be performing with Coldplay as a special guest on Sunday night after Bee Gees star Barry Gibb reportedly had to pull out because his mother Barbara fell ill

However, according to the newspaper, Barry will make his appearance after all as Barbara's health has improved. They are set to perform a three-song megamix of Barry's greatest hits.