thursday only on good morning ♪ america's summer concert series sponsored by revlon hair tools. >>> welcomeitions. >> the winner! >> reporter: and, yes, the kardashians, too. >> hit it! kourtney! >> reporter: pickleball is indeed here to stay. >> just in the past year nearly 50 million americans have picked up a paddle to play pickleball. no wonder it's america's fastest growing sport. two years ago we had to explain what pickleball was. now pickleball is on the tips of every tongue. >> reporter: city pickle co-founders helping bring the pickle craze to the big apple masses. we like to say whether you're 8 or 88 you can play pickleball. it's something you can learn in a very short time and have a good time playing. >> reporter: tell me three things i need to know. you are a certified pickleball coach. >> first thing serve must always be underhand. second, stay out of the kitchen. third, potentially most important, to have fun. >> reporter: i love fun so let's play. >> ready? >> reporter: i do love fun. so it was so much fun. pickleball is truly a sport for all ages, from kids to parents to