UPDATE: This story was updated on Thursday (Aug. 1) with a statement from the Michael Jackson Estate questioning the authenticity of the drawings. A rare collection of Michael Jackson‘s signed ...

The auction house noted that 'a few of Michael’s pieces are ... late singer in the mid-1990s; and a drawing titled 'Miss Chair' that was created by Jackson around the late 1990s, according ...

“It's such a silly sketch,” Key, 53, tells PEOPLE exclusively. “It's called MJ Halloween.” “I'm dressed as Michael Jackson, like ‘Thriller’ Michael Jackson,” recalls Key.