To be clear it's referring to everyone else she and Nick date.
Ear Worm: Plenty. Songs from Hannah Montana like "Best Of Both Worlds", "Nobody's Perfect", upbeat tracks such as "Who Owns My Heart" "7 Things" and her more serious ones like "The Climb", "When I Look At You", "Ready, Set, Don't Go", "Forgiveness And Love"...
Fandom Rivalry - Her fans and Selena Gomez fans don't really get along. Ironic because the two girls get along great.
Hype Backlash: Considering how hard she was pushed by Disney and how much of a Cash Cow FranchiseHannah Montana was, it was inevitable. However, a good chunk (possibly the majority) of the Backlash isn't against her, but more against Disney for shoving the whole Hannah thing down our throats for so long.
Germans Love David Hasselhoff: Some parts of America started hating her after she got sexier, so she took her tour elsewhere, mainly South America and Australia where she was successful in the "Can't Be Tamed" era.
Narm: The Climb is seen as this, also Narm Charm obviously by those who like it. When I Look At You could also apply.
Periphery Demographic - Despite being marketed to young girls. Apparently, she's popular with Hell's Angels (well, the type who give to hospitals etc.) and with boy-racers, unbelievably. She also has a significant gay male fanbase.
Also she, her music and her show does have a young adult fanbase.
Tear Jerker: "Robot," "When I Look at You", "Goodbye", "These Four Walls", "Take Me Along", "Bottom Of The Ocean","The Climb"