Drew Barrymore let fans see her vulnerable side on Tuesday when she shared behind-the-scenes footage of her having a meltdown ahead of her talk show debut.The Drew Barrymore Show successfully premiered on 14 September but backstage video posted to her Instagram showed just how nervous she was.In the video Drew is tearfully telling crew members that she’s "struggling" and vents a series of emotional frustrations to them.MORE: Drew Barrymore opens up about emotional weight loss journey WATCH: Drew