Andrew “Freddie” Flintoff, 42, couldn’t resist taking a swipe at Piers Morgan, 55, after he got involved in the “Me at 20” challenge on social media.The trend is a new craze on social media, which encourages people to unveil photos from their younger years.The Good Morning Britain presenter jumped on board and shared an unseen throwback photo of himself in view of his 7.3 million Twitter followers yesterday.Piers was pictured standing by a picturesque bay while wearing a printed T-shirt and a pair of short white shorts covered in red lip prints.The television personality captioned the snap: “Me at 20,” alongside a OK hand sign emoji.Freddie then shared a cheeky jibe aimed at his pal’s surprising fashion choice.The former international.