The NFL world was treated to a halftime spectacular show by Beyonce this Christmas , but for some the show was well below par. The former Destiny's Child star took to the pitch at halftime at Houston's NRG Stadium during Baltimore Ravens' game against the Houston Texans, which the latter won 31-2. Despite featuring tunes from her new album, Cowboy Carter, her performance was dealt a blow as fans complained online. However, one staunch fans was quick to jump to her defence - her mum. Tina