Jay-Z finds it hard to sing about his daughter Jay Z Wed-08-Feb-12 17:13 Share this Jay Z has said that he found it hard to perform the song he wrote about his baby daughter live on stage recently.He performed his song "Glory", which he wrote about baby Blue, in NY recently and said it was tough getting through the song. He must be missing his beautiful wife and daughter. You May Also Like Jay Z and Chris Martin take the London tube to Jay Z's concert Jay Z reckons he still could've gotten Beyonce if he wasn't famous! Jay Z feat. Justin Timberlake 'Holy Grail' - the video Become a fan of The Edge on Facebook and on Twitter .