Demi Lovato: Being sober is 'sexy'

After a rough 2011, Demi Lovato is ready to kick off 2012 with a new outlook on life, and a new definition of "sexy."

"I think sober is sexy. It's cool," the Disney songstress tells the February issue of Seventeen. "I think it's way cooler to be above the influence than under the influence."

In the issue, Lovato, 19, speaks candidly about last year's downward spiral, which ended with her checking into rehab.

"I'm not gonna lie. I was self-medicating. I was doing things like drinking and using [drugs], like a lot of teens do to numb their pain," she says of her troubles