What song, co-wrote by it's singer and producers Max Martin and Shellback, surpassed "Once a Day"  for the most weeks spent at number one by a female country artist?
Once a Day:  It was the first debut single by a female country artist to reach number one, and held the record for the most weeks spent at number one by a female country artist until it was surpassed by Taylor Swift's "We Are Never Ever Getting Back Together" in December 2012. We Are Never Ever Getting Back Together: "We Are Never Ever Getting Back Together" is a song recorded by American singer-songwriter Taylor Swift for her fourth studio album, "Red" (2012). We Are Never Ever Getting Back Together:  Swift co-wrote the song with its producers, Max Martin and Shellback.
i don't know