WAS IT NECESSARY FOR LADY GAGA TO GO NUDE?

27-year-old Lady Gaga uploaded a video of herself, on her Facebook page in which she can be seen completely nude and practicing the singing method known as the 'Abramovic Method,' .

In the video, Gaga can be seen stretching her vocal abilities in a secluded, forest in rural New York.
 
The Mistress of the Abramovic method - Marina Abramovic is a Serbian who discovered a method through which she trains people to observe and perform long-duration artistic/musical work.

Good method! My question is: Is it necessary to go nude before you can  practice a singing method?