Complete the following sentence: Carey performed a medley of her 1990 debut single "Vision of Love" with "Infinity" as part of its promotion, the first time being at the
2015 "Billboard" Music Awards<unk> on May 17, 2015, her first appearance at the awards show in seventeen years. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Andrew Hampp for "Billboard" noted that it was a "Octave-leaping" performance and one of the most memorable of the night.<unk> Andrew Hampp for "Billboard" noted that it was a "Octave-leaping" performance and one of the most memorable of the night. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Addario wrote that she sang "Vision of Love" with "evident confidence", but noted that the key had been lowered. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️