There's still some fire left in 'How to Train Your Dragon,' The five-week old movie earned an estimated $15 million this weekend, enough to reclaim the box office throne it last held a month ago and to edge closer to the $200 million mark (it's earned $178 million so far). 'Dragon' easily defeated the three new movies that opened this session, all of which debuted with so-so numbers, leading to the weakest weekend at the box office so far this year.

'Dragon,' a family film still riding high on its positive word-of-mouth, 3-D-enhanced grosses, and hefty theater count, had nearly taken the top spot last week against newcomer 'Kick-Ass.' This week, it dropped a mere 24 percent and remained the clear front-runner, with 'The Back-Up Plan,' Jennifer Lopez's much-heralded return to mainstream romantic comedy, settling for second place with a modest $12.25 million opening. Lopez was up against the still-strong rom-com 'Date Night,' which slid just 37 percent in its third week for a $10.6 million take and a total so far of $63.5 million.

Despite a colorful and clever marketing campaign, new action movie 'The Losers' opened in fourth place with just $9.6 million. Still, that was enough to make a loser of action rival 'Kick-Ass,' which plunged 52 percent in its second week, landing at No. 5 with $9.5 million (two-week total: $34.9 million).