When you set SiriusXM as Alexa's default music app, you won't need to say "on SiriusXM" when asking Alexa to tune to your favourite channels. To do this, visit alexa.amazon.ca or open the Alexa app and follow the instructions below:

-Tap the menu in the top left corner.
-Tap Settings, then Music (underneath Alexa Preferences).
-Tap Default Services (underneath Account Settings).
-Select SiriusXM as your default music library and default station.
-SiriusXM is now Alexa's default music app.