In terms of mainstream popularity, that's tapping the big one. Knowing the massive, mostly-female fanbase surrounding the Twilight films, he might be in for a sudden influx of fangirls.
Not that he needs it though. Mars was named one of Time Magazine's most influential people of the year and that was before the awaiting army of Twihard recruits. But if the retro-tinged sensation had any problem using his fame to charm the ladies before, he might just update that "I'm the 'Grenade' guy" line to "I'm the 'Twilight' guy" now.
And said Twihards: 'The Twilight Saga: Breaking Dawn -- Part 1' opens in theaters Nov. 18, but you already knew that.