Come up with 4 sentences with the words: sells like hot cakes, the icing on the cake, be a piece of cake, have her cake and eat it. 

1. The new smartphone model is so popular that it sells like hot cakes, with people lining up outside the store to get their hands on it.
2. Getting a promotion at work would be great, but having a supportive team would be the icing on the cake.
3. Don't worry about the upcoming exam, it will be a piece of cake for you since you've been studying diligently.
4. She wants to travel the world and have a successful career while still having time for her personal life – she wants to have her cake and eat it too.