Niall Horan's Twitter flirting

One Direction singer Niall Horan has been flirting with 'Hollyoaks' actress Rachel Shenton on Twitter. Horan, 19, was smitten with the 25-year-old actress after he spotted her on TV show 'This Morning' and took to his Twitter account to praise her beauty, reported Daily Mirror. "That girl on @itvthismorning is beautiful," Horan posted. In reply, Shenton and TV presenter sent him a picture on Twitter with the actress holding up a sign saying "Hello Niall. Horan immediately sent back his own picture message saying "Hello Rachel." However, Shenton later ruled out a romance, claiming Horan is too young for her. "He's a bit young for me! What is he? Like 12?" Horan has been previously linked to US 'X Factor' judge Demi Lovato.