BOSTON (AP) — Shawn Johnson's music stopped, and a gleaming smile spread across her face. One more title down, the biggest one still to go.

The reigning world champion took the first round in a rivalry with teammate Nastia Liukin that is sure to captivate all the way through the Beijing Olympics, winning her second straight title at the U.S. gymnastics championships on Saturday. Johnson finished with a score of 127.5, edging Liukin by a mere point.

Comeback kid Chellsie Memmel was third with another impressive performance. The 2005 world champion has missed most of the last two years after blowing out her right shoulder, but she's showing everyone she wants a spot on that Olympic team. Bad. She finished second to Liukin on uneven bars, and was fourth on both floor exercise and balance beam.

samantha Peszek, a member of last year's team that won the gold medal at the world championships, was fourth.