Handle entering an artist without a song

Hello. I'm getting error "IndexError: list index out of range"

$ playlistfromsong -s 'Kalya Scintilla'

PLAYLIST: 

Desert Dwellers - Lotus Heart - (Kalya Scintilla Remix)
Kalya Scintilla - Kalya Scintilla
Kaya Project - Kaya Project
Androcell - Androcell
Kaminanda - Kaminanda
Ott - Ott
Shulman - Shulman
Bluetech - Bluetech
Shakatura - Shakatura
Hibernation - Hibernation
Desert Dwellers - Desert Dwellers
Master Minded - Master Minded
Kalya Scintilla -  similar
Kaya Project -  similar
Angel Tears - Angel Tears
Random Rab - Random Rab
Entheogenic - Entheogenic
Tripswitch - Tripswitch
Androcell -  similar
Kaminanda -  similar
Akasha - Akasha
Cell - Cell
Younger Brother - Younger Brother
Digital Mystery Tour - Digital Mystery Tour
Traceback (most recent call last):
  File "/usr/local/bin/playlistfromsong", line 9, in <module>
    load_entry_point('playlistfromsong==0.12', 'console_scripts', 'playlistfromsong')()
  File "/usr/local/lib/python2.7/dist-packages/playlistfromsong/__main__.py", line 213, in main
    youtubeLinks = useLastFM(song, num)
  File "/usr/local/lib/python2.7/dist-packages/playlistfromsong/__main__.py", line 140, in useLastFM
    for data in p.map(getYoutubeAndRelatedLastFMTracks, lastfmTracks):
  File "/usr/lib/python2.7/multiprocessing/pool.py", line 251, in map
    return self.map_async(func, iterable, chunksize).get()
  File "/usr/lib/python2.7/multiprocessing/pool.py", line 558, in get
    raise self._value
IndexError: list index out of range

$ python --version
Python 2.7.9

Best regards, Dmitry.