If you are using the model from this tutorial, select the lower portion of her leg and copy-&-paste it in a new layer. Rotate the leg horizontally and place it beneath the Model layer. Play with its orientation and size until it gives the impression that it is her second leg and she is dancing. It’s okay if it is not 100 per cent correct – implied realism creates more intrigue. For organizational purposes, merge the two layers so it is easier to reposition her later.
Use a stock photo or create your own TV. Use the Pen Tool (P) to trace the outline of the TV and screen. Select the path in the Paths palette and resize it (Cmd/ Ctrl+T). Load the path as a selection, create a new layer (Cmd/Ctrl+Shift+N), and fill with black. Using the Polygonal Lasso Tool (L), make a selection slightly larger than the screen area. Fill this with a medium grey (#696869) on a new layer behind the TV. Use the Magic Wand Tool (W) to select the screen. Brush white over one corner of the screen. Adjust the lightness in the Hue/Saturation palette (Cmd/Ctrl+U) to about -22. Repeat in the other corner.
Resize the television and the model to fit into the frame together. Here is where your collection of assets and shapes comes in handy. Unless it is something client specific, I always reuse elements. Compile your elements, and make use of the Warp feature (Cmd/Ctrl+T then Right-click/Ctrl+Click > Warp) to create a white structure to place behind the model. Place this behind the TV and the model. Feel free to add extra elements and textures to give this, or any piece, more intricacy.