 Complete the following phrase:  On February 6, 2016, Beyoncé released Formation and its accompanying music video exclusively on the music streaming platform Tidal; the song was made available to download for free. She performed Formation live for the first time during the NFL Super Bowl 50 halftime show. The appearance was considered controversial as it appeared to reference the 50th anniversary of the Black Panther Party and the NFL forbids political statements in its performances. Immediately following the performance, Beyoncé announced The Formation World Tour, which highlighted stops in both North America, and Europe. It ended on October 7, with Beyoncé bringing out her husband Jay-Z, Kendrick Lamar, and Serena Williams for the last show. The tour went on to win Tour of the Year at the 