Cher is the only artist to have a number-one single on a "Billboard" chart in six consecutive decades, from the 1960s to the 2010s. She has held US "Billboard" Hot 100 number-one singles over the longest period of time in history: 33 years, seven months and three weeks between "I Got You Babe", which topped the chart for the first time on August 14, 1965, and "Believe", whose last week at number one was April 3, 1999. With "Believe", she became the oldest female artist to have a US number-one song in the rock era, at the age of 52. "Billboard" ranked her at number 43 on their "Greatest Hot 100 Artists of All Time" list. In 2014, the magazine listed her as the 23rd highest-grossing touring act since 1990, with total earned revenue of $351.6 million and 4.5 million attendance at her shows.