Serena Willams and Lil Mama Join In Blonde Hair Trend. Just last week we noticed a new trend blossoming in Hollywood, chics are going blonde. Since then we’ve noted quite a few other celebs joining in on this hot new trend, including Serena Williams and Lil Mama just to name a few. With both of these ladies recently dying their tresses blonde, ( although both ladies have been blonde before), we think it’s no coincidence that this whole blonde trend just might be the next big thing. Look below to see Serena and Lil Mama rocking their newly dyed manes.