Complete the following sentence: In March 2015, it was confirmed by "People" magazine that Spears would release a new single, "Pretty Girls", with Iggy Azalea, on May 4, 2015. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Spears and Azalea performed the track live at the
2015 "Billboard" Music Awards from The AXIS, the home of Spears' residency, to positive critical response. Entertainment Weekly<unk>praised the performance, noting "Spears gave one of her most energetic televised performances in years". ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️