One of the objectives of the Blonde Bombshell challenge is to pose for a scandalous magazine. To do this, you need to become famous and unlock the Fame section in the game. Here's how to do that.
BitLife Guide - How do I pose for a scandalous magazine?
How to become a Famous Model in BitLife
There are several ways to become famous in BitLife, but since you are completing the objective as part of the Blonde Bombshell challenge, becoming a well-known model is the compatible path, as the third objective of the current challenge requires players to become a model.
From a young age, maintain your Looks stat above 90 by visiting Gyms and Salons at least once a year. After graduating high school, join the industrial force as a Factory Worker (Corporate). Work there for three to four years and resign from your post.
Search for a job as a Foot model from the Full-Time job section. If you find such a post apply for it and crack the interview. Since your Looks stat is above 90, the job will be offered to you without much hiccup. Voila! You have become a model in BitLife.
Now, it's time to become a celebrated and famous model. Firstly increase your work hours to 70+ hours and then use the Work Harder option from your Job's Activities tab at least once a year. With time, you will start climbing the ladders of the model industry and soon become a hand model, followed by a Catalogue model, then a Lingerie model, and finally a Runaway model.
Foot model -> Hand model -> Catalogue model -> Lingerie model -> Runaway model
Once you have become a Runaway model, you will automatically become famous, unlocking the fame parameter.
Posing for a scandalous magazine in BitLife
After unlocking the fame section, you can start posing for magazines. Visit the fame section from the Activities tab and select the Photo Shoot option. The game will immediately start offering you contracts for a Photo Shoot session with any popular magazine. Accept offers of the type Nude as shown in the below image.
After doing an adult-rated/scandalous cover shoot, the current objective will be over.
For more on BitLife, check out How to become a Model in BitLife or How to have 100% Looks and Smarts in BitLife on Pro Game Guides.