Adele and Beyonce turn in show-stopping Grammy performances

By Jill Serjeant and Piya Sinha-Roy LOS ANGELES (Reuters) - Pop superstar Beyonce, proudly caressing her pregnant belly, took the Grammys stage by storm on Sunday on a night marked by political statements, sentimental tributes and a misstep by British singer Adele. In her first public appearance since her surprise announcement 12 days ago that she is expecting twins, Beyonce donned a sheer, glittering gold dress and halo to sing a medley of emotional ballads "Love Drought" and "Sandcastles" from