Whatever might be happening to Beyonce to justify such an animated facial expression? Wait a minute, we know that look... That's right, Beyonce was caught in the act, right there on the Madison Square Garden stage; cheating on her Telephone fiancée with old-time flame Alicia Keys. Adding confusion to the general chaos was Beyoncé's other "other half" Jay-Z, the second surprise guest at last night's Alicia Keys NYC performance.

Some may have wondered how anyone could possibly cheat on someone with hair so yellow and cigarette shades so smoky but in all fairness it looks like there was chemistry aplenty on stage between the two ladies. There were all the telltale sign; Beyonce had even dressed up for the occasion in a slither of black lace first seen on the Dolce & Gabbana S/S 10 catwalk. With a pretty spectacular result.

We wouldn't worry too much; as some might say, a lover is for a one-night gig, a cellmate... for at least another few rounds on MTV.

Photo credits: Getty Images