Is Lady Gaga's train losing steam?  The nominations are all in for the 2010 American Music Awards, and leading the pack with five nominations each are Lady Antebellum and Eminem, followed by Justin Bieber with four.  Gaga has only been nominated for two awards this year---favorite female artist and artist of the year.  Last year, you'll recall, she went home empty-handed like the other falling female star, Taylor Swift, who herself was only nominated for one award this year.  The AMA's are voted on by fans, so the results directly reflect what the people feel and want in music.  In a related story, local Los Angeles singer Alisa Apps has challenged Lady Gaga to a televised $1 million sing-off after calling Gaga "a plastic doll generated by the music money marketing machine".  The contest would be held in either New York's Madison Square Garden or London's O2 Arena.  Apps has yet to release her first album but her music video has racked up 1.2 million hits on YouTube.  Is Gaga running scared?  She won't answer the challenge.