WASHINGTON: US celebrities are rallying their fans to raise money for survivors of the massive earthquake and tsunami in Japan, with Lady Gaga leading the charge and raising $250,000 in 48 hours. She announced her plan Monday to raise money by selling red and white wristbands bearing the message “We Pray for Japan” for $5 a piece via her website.Rock band Linkin Park began taking orders Monday on its website for T-shirts to raise money for Japan. The shirts were designed by band member Mike Shinoda, whose father is Japanese-American. Katy Perry tweeted to fans in Germany ahead of a concert there Tuesday, urging them to buy a light-up wand at the show's merchandise stand.