We often gain weight after holiday season.
If you're looking for a way to hide that tummy, the best thing to do is to wear horizontal stripes clothes such as this one from Topshop
These following are from Styleceo site
Michael Stars V-Neck Stripe Dress in White/Navy
If you're looking for much colorful style then this will fit your taste
RVCA Women's Heart to Tell Stripe Dress
Now worry no more, and hide that tummy away.