Loaded Questions 1/7/23 - Pop Music

Does anyone really know what time it is?

1. Released in 2008, 2009, and 2011, 75% of Britney Spears' #1 hits are "Womanizer", "3", and what song?

2. Written for "Top Hat" and nominated for an Oscar, what 1935 Irving Berlin song begins "Heave…