The 2024 Halloween update for Dress to Impress on Roblox has a few hidden accessories and items that players can find when dressing up for a theme. Four of these items are scattered throughout the main area, but you'll need VIP to get the fifth secret item from the DTI Halloween update.

When you spawn in the main area (after choosing a theme), go to the doorway of the VIP area.

There is a plant in a white pot to the right of the doorway. If you look at the top of the earth, you can see a small hot dog in a bun.

Click on the mini hotdog and it will be added to your avatar as a full-fledged hotdog costume.