Will Smith was joking around (we think) when he boasted that being a Smith equaled box office big bucks. “Put any Smith in there, it’s No. 1,” he bragged to Access Hollywood at his Seven Pounds premiere last night in LA. In fact, his son Jaden’s movie The Day the Earth Stood Still was No. 1 last week, but the proud dad says his kids will stay down to earth. “[Jaden’s] just well adjusted,” said Will. “Willow is the one. That’s the one I have to keep my eye on. Don’t let her get to No.1!” But it’s poppa Smith who’s going to have to prove his mettle with his new movie, where he shares a steamy love scene and a much-talked about kissing (with tongue!) scene with co-star Rosario Dawson. “I think that’s the first time for that one,” he admitted. ‘It’s embarrassing, [but] I felt good about it.”