When a friend wrote “Kurt smells like teen spirit” on a wall, Kurt Cobain assumed it was an anti-establishment slogan and titled the hit song with it. Months later he found out his friend had been making fun of him as Kurt’s girlfriend wore a deodorant called Teen Spirit.–WTF Fun Facts
Source: https://en.wikipedia.org/wiki/Smells_Like_Teen_Spirit
Rolling Stone magazine originally gave Nirvana’s Nevermind a 3-star rating in 1991. They now give it 5 stars and rank it as the 17th greatest album of all time. – WTF Fun Facts
The band Foo Fighters started with just Dave Grohl alone playing all the instruments and singing all the vocals. He hoped the name would keep him anonymous and make people think there were multiple band members. He now thinks its a terrible name. – WTF Fun Facts
Source: https://www.clashmusic.com/news/foo-fighters-on-their-band-name