British rocker ROYSTON LANGDON celebrated his new group ARCKID's first show in style last week (02AUG06), with a rooftop gig in front of father-in-law Steven Tyler and David Bowie. The former Spacehog frontman, who is married to Liv Tyler, staged a show on top at the Hugo Boss Roof Deck venue in New York. Also among the crowd were actress Julia Stiles and designer DONNA KARAN.