Why is Facebook icon missing after updating Lenovo A6000 Plus to Lollipop?

Yesterday I got the Android Lollipop update for my Lenovo a6000 plus. I updated it, and it rebooted I noticed Facebook app icon missing but It was installed on my phone. I can't see the icon and Cannot open it. Can you please give me a solution?. Please reply fast..

Facebook icon missing in lenovoA6000plus after lollipop update

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