LOS ANGELES (AP) -- Pop star Britney Spears has tied the knot -- again. Entertainment Tonight is reporting the 22-year-old Spears married her fiance, dancer Kevin Federline, last night at a private home in Studio City. Only a couple dozen friends and family members were in attendance. Spears announced her engagement to the 26-year-old Federline in June. He has appeared in the movie "You Got Served" and performed as a backup dancer for Spears' ex, Justin Timberlake. It was the second marriage in nine months for Spears. In January, she got hitched to childhood friend Jason Alexander in a surprise...