Blogged By: De De Tillman Source: dailymail Posted: Sunday May 12, 2013 @ 3:00 p.m PST     Britain’s most eligible bachelor then joined the crowd in singing ‘Happy Birthday’ to the champion swimmer Missy Franklin, who turned 18. Read more: http://www.dailymail.co.uk/news/article-2322912/Prince-Harry-sings-Happy-Birthday-18-year-old-Olympic-swim-star-Missy-Franklin.html#ixzz2T7NMxzJ5 Follow us: @MailOnline on Twitter | DailyMail on Facebook