What are some ideas for new music play list?

I'm getting tired of listening to the same songs over and over again and want a whole new list of songs to listen to. Do you have any suggestions? I like avril lavigne, the killers, my chemical romance, alanis morisette, madonna, kd lang, evanescence, ashlee simpson, iggy pop, miley cyrus, within temptation, midnight oil, the veronicas, nirvana, katie perry, pink, joan bias. If I like those singers, what other singers would I like?