The 1969 Fender Mustang Kurt Cobain played in Nirvana's "Smells Like Teen Spirit" music video sold for $4.5 million. The guitar was sold at Julien's Auctions May 22.

The Jim Irsay Collection of Indianapolis won the bidding war.

Read more: Kurt Cobain’s “Smells Like Teen Spirit” guitar is up for auction

The Cobain family is donating a portion of the proceeds and other select Cobain items to Kicking The Stigma. The initiative aims to raise awareness of and eliminate the stigma surrounding mental illness.

Darren Julien, president and chief executive officer of Julien's Auctions, commented on the sale.

"This once-in-a-lifetime auction has been one of the greatest privileges in my professional career, and I'm duly pleased that the proceeds will also bring much-needed attention to mental health awareness," Julien says.

Cobain wasn't the only celebrity whose items were available to purchase. Other notable items included Bruce Springsteen's handwritten lyrics to "Born To Run" and Johnny Cash's 1956 Martin model D-21 acoustic guitar.

Check out Cobain's guitar in action below.