There's no ice or juice in this smoothie -- it's not necessary. The frozen fruit is cold enough! (Frozen fruit, if it's unsweetened and unprocessed, can be just as nutritious as fresh -- but a lot cheaper.)
1/2cupplain Greek yogurt
1/2cupfrozen mango chunks
Throw everything in the blender and hang on tight while it works through those mango chunks. You may need to stop, give it a little stir, and start it up again.