[Derek Lam and Rihanna. All photos by BILLY FARRELL for Pmc] Everyone has been on Rihanna watch since "the incident" and the fashion-savvy beauty has been keeping the NYC paparrazzi busy all week starting with the Met Gala followed by shopping all over the Big Apple. Last night, RiRi and her hair-do ventured to Soho where she stopped by the Derek Lam boutique opening to show her support for the designer and his new Crosby Street location. The singer joined Lam's closest friends and family including the likes of Anna Wintour, LA Reid, Nate Berkus, Lam's longtime partner Jan-Hendrik Schlottman, Phillip Lim, Derek Blasberg, Fern Mallis, and the crutches-adorned Anne Slowey.

More story and photos below...

Guests stopped by to celebrate the designer's new location complete with cocktails, vegetarian treats, and plenty of exploring through the boutique's circular rooms housing Lam's spring designs flawlessly. More photos from this event below...

Jan-Hendrik Schlottman, Glenda Bailey, Derek Lam, Kristina O'Neill

J Errico

Rihanna, LA Reid, Derek Lam, Derek Blasberg

Derek Lam, Anne Slowey, Maryna Linchuk

Jan-Hendrik Schlottman, Katharina Harf, Rihanna, Derek Lam

Kate Etter, Hanuk

Zuzana Gregorova, Karen Duffy, Filipa Fino

Rihanna, Derek Lam

Amanda Ross, Mary Alice Stephenson, Jan-Hendrik Schlottman, Fern Mallis

Rihanna