Beyoncé by miles. No one is interested in 15yrs ago receipts, its who has longevity and consistency in their career. Bey has the singles, albums, critical acclaim, respect, huge tour grossing, most importantly she is still RELEVANT. Call me when Britney can sell 3 million albums world wide in 2 months, with no promotion and no discounts in the 2010s, the era of high internet piracy.