Rebel rocker Nancy Sinatra plays the Bottom Line tonight, singing songs from her new album, "California Girl." And of course, "These Boots Are Made for Walkin"' is on the lineup, even if Sinatra doesn't really wear them so often anymore. "I usually wear sneakers," she says. "I had knee surgery and I'm always in my Nikes." Still, re-booting is always an option. "I should have done my own line," she says. "I've been trying to get that together for 35 years.""