A new report from In Touch magazine claims that fame may be going to Demi's head, with a source telling the mag that she has a "not-so-nice new 'tude."
The insider added, "She acts like she's better than the new judges. She has a 'this isn't my first time judging' type of attitude."
'In Touch' specifically predicts a problem between Lovato and judge Paulina Rubio.
“Paulina is fiery. She can go very crazy!” explains the tab’s insider.
Uh-oh!
Demi's VEVO channel hits 2 millions subscribers
Actived in July 2011, hitting 1 millions after 21 months in early April this year and hitting 2 millions 2 months later
X Factor & two radio hits, especially HA made a major impact on her streaming power.