When there is a tie in spot jumps, it doesn't count. It matters by the difference of last week and this week's sales.
Bey. Drake. Nicki. Bon-Qui-Qui.
Sean Paul - Janet Jackson - Ciara - Whitney Houston - Cassie - Lady Gaga -Destiny's Child - Missy Elliott - Mariah Carey - Lana Del Rey - J. Cole - Mary J. Blige - Frank Ocean - Rihanna - Pitbull - Ameriie - Britney Spears - Eve - Trina - Madonna - Khia - Kanye West