Social Media Wrap: Shake Shack Leicester Square's new look; Chaiiwala's 101 milestone; Patisserie Valerie's new cake

Find out what QSRs have been up to on social media this week.

Shake Shack unveils Leicester Square restaurant's new look.

Chaiiwala opens 101st outlet.

Patisserie Valerie unveils new Champagne Berry cake.