 In November 2003, she embarked on the Dangerously in Love Tour in Europe and later toured alongside Missy Elliott and Alicia Keys for the Verizon Ladies First Tour in North America.On February 1, 2004, Beyoncé performed the American national anthem at Super Bowl XXXVIII, at the Reliant Stadium in Houston, Texas.After the release of "Dangerously in Love", Beyoncé had planned to produce a follow-up album using several of the left-over tracks.