United Kingdom, Oct. 28 -- Bam Margera has celebrated a year of sobriety after "deleting" all the "negative" influences from his life.

The former Jackass star spent years battling substance abuse issues and legal troubles, but he's now revealed he's been clean for more than 12 months after celebrating his "sober day" on September 28.

He told TMZ.com: "I reached a year - September 28th is my sober day ..."

Bam, 46, went on to compare himself to troubled pop star Britney Spears and insisted he got back on track with the help of his wife Dannii Marie and removing a number of people from his contacts.

He said: "I was in the same situation [as Britney Spears] I didn't know who to believe, I didn't know who to trust.

"And finally, when I d...