Fun facts:

Whitney Houston, Welcome Home Heroes with Whitney Houston, 7.9 million viewers
Barbra Streisand, Barbra: The Concert, 11.2 million viewers
Madonna, Madonna Live: The Drowned World Tour, 5.8 million viewers
Britney Spears, Britney Spears Live from Las Vegas, 5 million viewers
Lady Gaga, Lady Gaga Presents the Monster Ball Tour, 1.2 viewers
Janet: Live in Hawaii, 4.4 million viewers
Janet: Live in Hawaii 15 million viewers

On The Run Tour... 888K