...  Davina McCall says she doesn't drink as it will lead to drugs – here's … Other celebs to drop the habit include McFly singer Dougie Poynter who even attempted suicide after a long battle with drugs and alcohol, Colin Farrell who battled substance addiction and alcoholism for a decade, and former Radio One presenter Zoe Ball … Read more on Mirror.co.uk From Russell Brand and Gerard Butler, to Denise Welch and Kelly Osbourne, a … Other celebs to drop the ...