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.