Demi Lovato said on twitter what the answer to Miley Cyrus is. The 20-year-old singer said that she will be able to attend. We can't wait to see the two of them together after almost a year since she last saw Miley. Miley was crushed when Demi went to rehab so Miley was very happy about the news. Demi has been working on filming her new music video for Made In The USA.