Kanye West  made a fashionable stop at the Generation W party in NYC last night after making a surprise appearance on Late Night  earlier that day. The rapper mingled with W editor Stefano Tonchi at the bash that included a guest list of stylish celebrities like Downton Abbey's Michelle Dockery, Rachel Zoe , Allison Williams, and Ciara. However, Kanye was the talk of Twitter yesterday when he stopped by Jimmy Fallon 's talk show to perform "Bound 2" with The Roots and Charlie Wilson. Despite his pop-up appearance on TV, this week has been all about fashion for Kanye, who dropped by the Mademoiselle C premiere  last Friday and sat in the front row at shows for Alexander Wang , Louise Goldin, and Hood by Air . Kim Kardashian  hasn't been accompanying Kanye on any of his Big Apple stops as she is remaining at home in LA to watch over the couple's daughter, North West. Kim and Kanye may have to get used to spending time apart as the rapper announced that he will be going on tour this Fall, marking his first major tour since 2008.
Kanye West  met up with Stefano Tonchi.
Michelle Dockery posed on a staircase.
Allison Williams chatted with Stefano Tonchi.
Ciara wore thigh-high boots.
Kanye West  chatted with art collector Maria Baibakova and Stefano Tonchi.
Zachary Quinto  stepped out with Richard Chai .
Lily Aldridge wore a bra top.
Rachel Zoe  mingled with photographer Craig McDean.
Rose McGowan wore an eccentric skirt.
Anne V. wore a matching pantsuit.
Kanye West  performed on Late Night.