Singer Katy Perry says that she often approaches fans in disguise and hands them concert tickets while she is on tour.

The 29-year-old wants her fans to know that just because a show is sold out, doesn't mean there aren't any tickets left, reports contactmusic.com.

"Sometimes, when we go bike riding the day before or the morning of a show, we take some tickets and stop along the way in coffee shops and places, and give them away secretly - but I wear a hat and sunglasses so you don't really know that it's me," said Perry.

The singer uses her time on the road as an opportunity to see parts of the world she would never otherwise visit, ensuring she makes trips to famous landmarks.

The "Roar" singer will kick off her 107-date Prism world tour in Belfast, Ireland, Wednesday.