Add Sandra Bullock's name to the list of celebs helping out in the wake of Hurricane Harvey. And she's doing so in a big way: Bullock has pledged $1 million via the American Red Cross to help victims. "I'm just grateful I can do it," Bullock, who owns a home in Austin, tells E! News. Other big names stepping up include the Kardashians, who have donated $500,000, and Kevin Hart, who launched a challenge to get fellow celebs to donate $25,000. Meanwhile, Coldplay, which had to cancel a gig in Houston, wrote a song in tribute to the city, which you can hear them perform via CNN. (More Sandra Bullock stories.)