Gaga performed a tribute to "The Sound of Music" (1965) at the 87th Academy Awards, where she sang a medley of songs from the film's soundtrack. The performance was considered one of her best by "Billboard", and triggered over 214,000 interactions per minute globally on the social networking site Facebook. In 2015, Gaga released the song "Til It Happens to You", which she performed at the 2015 "Billboard" Women in Music, Producers Guild of America Awards 2015 and 88th Academy Awards. In 2016, she sang the US national anthem at Super Bowl 50, teamed with Intel and Nile Rodgers to perform a tribute to late David Bowie at the 58th Annual Grammy Awards and performed "Million Reasons" at the American Music Awards of 2016. To promote her fifth studio album, "Joanne" (2016), Gaga embarked on a 3-date tour, called Dive Bar Tour, and on the Joanne World Tour. On February 5, 2017, she performed as the headlining act at the Super Bowl LI halftime show, becoming the second most-watched Super Bowl halftime show, with 117.5 million television viewers in the United States. A total of 5.1 million tweets were made about Gaga's performance, making her the most tweeted about entertainer in the show's history.