Frida Kahlo died in 1954, but her legendary unibrow may be the summer's biggest—and boldest—beauty trend. A number of figures in pop culture, including Sesame Street's Bert and New Orleans Pelicans baller Anthony Davis, have sported a unibrow over the years. Thicker brows have even reigned supreme in beauty over the past few years. However, the unibrow hasn't been as mainstream.