Gravitas of music

I really enjoy Dido’s music; I find it very easy to listen to for most background music situations. When I’m at work my music comes from youtube playlists which is great for variety. It is also often amusing when I catch a glimpse of say, Dido’s video for "Here With Me". What I want to know is how Dido’s breasts don’t fall to the side when she’s lying on the bed. Gravity is constant and there’s only so much that garment tape can do, right? On the other hand, I’m sure there are drag queens that would tell me differently....