tag.getTopArtists  Get the top artists tagged by this tag, ordered by tag count.
  Example URLs  JSON:  /2.0/?method=tag.gettopartists&tag=disco&api_key=YOUR_API_KEY&format=json XML:  /2.0/?method=tag.gettopartists&tag=disco&api_key=YOUR_API_KEY 
  Params  tag  (Required) : The tag namelimit  (Optional) : The number of results to fetch per page. Defaults to 50.page  (Optional) : The page number to fetch. Defaults to first page.api_key  (Required) : A Last.fm API key.
  Auth  This service does not  require authentication.
  Sample Response   Errors  2  : Invalid service - This service does not exist3  : Invalid Method - No method with that name in this package4  : Authentication Failed - You do not have permissions to access the service5  : Invalid format - This service doesn't exist in that format6  : Invalid parameters - Your request is missing a required parameter7  : Invalid resource specified8  : Operation failed - Something else went wrong9  : Invalid session key - Please re-authenticate10  : Invalid API key - You must be granted a valid key by last.fm11  : Service Offline - This service is temporarily offline. Try again later.13  : Invalid method signature supplied16  : There was a temporary error processing your request. Please try again26  : Suspended API key - Access for your account has been suspended, please contact Last.fm29  : Rate limit exceeded - Your IP has made too many requests in a short period