This is a cover of a song which was penned by American Country music singer Keith Whitley, whose brief career in mainstream Country music lasted from 1984 until his death in 1989.
Johnson told Billboard magazine: "I had never heard that song before, and it turns out I don't think Keith has ever put it out. The only version I've ever heard is a work tape that he did back when he wrote it. It's a great song."
"What's Up" by 4 Non Blondes has endured as one of the most popular songs of the '90s, but it wasn't a huge hit at the time and the band split after one album. Frontwoman Linda Perry went on to write hits for Pink and Christina Aguilera.
Country star Slim Whitman's version of the 1920s song "Rose Marie" spent 11 consecutive weeks at #1 in the UK in 1955, a record until 1991 when Bryan Adams’ "(Everything I Do) I Do It For You" spent 16 weeks at the top.
When "Nothin' On You" reached #1 on the Hot 100, B.o.B became the first American act whose name is a palindrome to top the chart. The other two who did so prior to the Atlanta rapper were both Scandinavian groups - ABBA and A-Ha.