**UPDATE: Miley and Justin broke off their relationship in June 2009. Some media outlets blamed her overly-friendly relationship with ex-boyfriend Nick Jonas for the split.**
Success. According to Forbes, Miley Cyrus earned $25 million between June 2007 and June 2008, both as Hannah Montana on the Disney Channel and as a teen singing sensation. Not bad for a teenager! Gaston, on the other hand, was a largely-unknown model before he started dating Miley last year, but now his stock is rising -- and so is his own music career.
Attractiveness. Gaston models underwear, so that should speak for itself. His long hair is positively dreamy, and among his clients are Diesel, Armani and Cavalli. For her part, Miley is cute as a button, but like any teenager, she has some growing up to do before she reaches bombshell status.
Popularity. No one, hands down, is more popular than Miley Cyrus. The paparazzi and tabloids love her almost as much as her fans do, and now that she has some arm candy, people are equally intrigued by Gaston. Last month alone, 20 million people searched Google for details on Miley, and another 60,000 searched for Justin.
Compatibility. Miley's a lighthearted Sagittarius, while Justin's a passionate Leo, but both tend to be generous and loving. The stars are aligned for these teens, so go ahead and get that "Miley and Justin Forever" tattoo you've been wanting.