I love the magazine cover style, lots of text, beautiful poses and interesting cropping.
This challenge isn't very difficult, but it requires creativity. I made it into a card one, because I think it's easier to find elements than for a wall.
One word of advice, don't hesitate to use real elements over anime ones. For example to put a real flower or background. Also, the text makes the magic, so I suggest fonts like these: Retro, but calligraphy is also a great touch.
One last thing, I said 'diva' but there can be guys too XD The title just sounds awesome with Diva.
Please do your best to make it as coverish as possible <3