The size of the shows vary but the average size of the shows we've been doing this tour are between ten to twenty thousand people. Yeah, they always sing happy birthday. We do it during any of our birthdays, anyone in our back up band or in our family and usually bring the person out and bring out a cake and everything. We celebrate a lot of things on stage with our fans. Birthdays, anniversaries, graduations... Anything big that happens in our lives, we like to share with the fans basically.