Part II: Lady Gaga discusses her controversy with Christina Aguilera and reveals what she wears to bed.
Part IV: Lady Gaga reveals the difficulty of baring it all in 'Vogue.'
Part I: Lady Gaga names her favorite collaborators.
Part III: Lady Gaga opens up about Marina Abramovic and her powerful journey into the woods to sober up.
Lady Gaga sticks her hand in the glory hole and guesses the object in this hilarious #WWHL game.
Lady Gaga reveals her 'Housewives' tagline and names her favorite cast members.
Lady Gaga reveals the best place she's gotten it on and talks about her Molly use.