The bassist spent two days vomiting after he caught the virus but he did not let it stop him from performing with the Sex on Fire rockers in Vancouver, Canada on Sunday (30Mar14).
He wrote on Twitter.com, "If anyone wants to lose some weight quick and easy, come drink after me. This bug will take care of ya (you). I've lost 4lbs since yesterday morn (morning)."
He added following the concert, "Vancouver just made me forget about the fact I haven't kept any food down in 48hrs (sic). You Canucks really brought it. Feeling better already."
The group's Mechanical Bull tour will continue in Calgary on Tuesday (01Apr14).