'They are as dense as dying stars!' Crazy Ex-Girlfriend star Rachel Bloom jiggles her DD breasts as she performs comical song about how women deal with 'heavy boobs'

Rachel, 28, is the Golden-Globe-winning star and co-creator of The CW's musical show Crazy Ex-Girlfriend. 

On Monday night's episode, she sang a song called Heavy Boobs about what it's like to be weighed down by big breasts. 

She says her breasts are 'dense like dying stars' and have been known to trap food that falls out when she gets undressed. 

She also also explains how it's difficult to run, as she and her back-up dancers dance and bounce around. 

At the end of the clip, though, they moan about how much that bouncing hurt. Still, she notes that it isn't all bad, and she knows her breasts look great in a shirt.