Rule makers, rule breakers at Grammy Awards ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page JASON MERRITT/GETTY IMAGES If we had to pick the gold standard of the night, the award would undoubtedly go to Justin Timberlake. JORDAN STRAUSS/INVISION/AP Rihanna wore a custom ruby red Azzedine Alaia gown. JORDAN STRAUSS/INVISION/AP Jennifer Lopez’s Anthony Vaccarello gown seemed to be having an identity crisis. MARIO ANZUONI/REUTERS Carrie Underwood walked in wearing a Roberto Cavalli gown and 381 carats of diamonds. FREDERIC J. BROWN/AFP/GETTY IMAGES Adele managed to leave her comfort zone of retro-inspired little black dresses.