Pete Davidson posted an alarming note on his Instagram page Saturday. Pete Davidson, via Instagram Ariana Grande rushed to the NBC's 30 Rock building to see Pete Davidson after reading his post. According to TMZ, Davidson alerted his security to keep his ex-fiancée from seeing him when she arrived at the building. Ariana Grande, via Twitter Davidson would not leave his dressing room Saturday during rehearsals for
'Saturday Night Live.' He was relegated to one line on the show where he introduced Miley Cyrus.