Leona Lewis gets terrible road rage.

The usually mild mannered singer insists her ''placid'' public persona is not entirely accurate and she often gets mad when she is behind the wheel.

In an interview with UK newspaper Metro, she revealed: ''Most people think I'm really quiet and placid but I can be fiery. I get road rage. I can't drive because I cuss people out.

''The last real outburst was a few days ago. This man called my friend, who was driving, a bitch and he got the wrath of everything that happened in my life that month.

''I wound down the window and shouted and screamed. I don't think he knew who I was but looked shocked someone was being so crazy. I have to try to use calming techniques when I drive.''

Although Leona, 27, has become one of the most famous singers in the world since winning 'The X Factor' UK in 2006, she tries to avoid reading stories about her life and never searches her name on Google.

The 'Glassheart' hitmaker - who is dating One Direction star Liam Payne - said: ''I can't remember who told me but I was advised early on not to Google myself or read things about myself ... I don't read a lot but get the gist of what's been said from friends and family. It's good to avoid it if you want to be normal person.''