It used to be that signing a record deal was the apex of a musician's success. Record labels (and distribution deals) aren't what they used to be, and with the thousands of pipelines available for bands to get their music into the world and the hundreds of thousands of musicians using every avenue available, success, however subjective, is much more difficult to achieve. Performing on and being interviewed for a TV show not only indicate a musician's rise but can certainly help launch a career.
Hip-hop electronic artist K. Flay seems more interested in experimenting with sound and sharing her music with as many people as possible but she has certainly seen success: Flay has opened for big names like Snoop Dogg and Ludacris. But a February episode of Last Call with Carson Daly that featured an interview with the charming, stylish good-humored artist may have introduced and endeared her to a whole new audience. That's definitely a win/win.