When Nirvana reunited last night in New York with Paul McCartney replacing Kurt Cobain, Courtney Love wasn't cheering. She was very upset about the performance.

Dave Grohl and Krist Novoselic played at the 12-12-12 benefit concert at Madison Square Garden. It was their first show together in 20 years, but Courtney told TMZ she wasn't "amused" about Paul being involved.

Courtney said: "Look, if John were alive it would be cool."

She's also upset at Krist and Dave for calling the show a Nirvana reunion because she thinks Kurt was the heart and soul of the band.

For the record, McCartney and the guys played a brand new song they wrote together.

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