Nicole Scherzinger, Johnny Knoxville, Gok Wan and One Republic

In tonight's show Alan is joined by X Factor judge Nicole Scherzinger, US actor and Jackass star Johnny Knoxville who discusses his new film Jackass Presents: Bad Grandpa, and Gok Wan tells Alan all about his new book Gok's Wok, while music is from One Republic who perform their latest single Counting Stars.