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NEW YORK ( TheStreet) -- Where can investors find the best growth stocks? All over place, if you know where to look, Jim Cramer said on "Mad Money" Tuesday. In the biotech space, Cramer called out Regeneron ( REGN) as one such stock -- it has growth today and, thanks to a robust pipeline of new drugs, for many years to come. The oil patch is littered with high-growth stocks, including EOG Resources ( EOG), Cramer continued. Restaurants Red Robin Gourmet Burgers ( RRGB) and Starbucks ( SBUX) both have growth, as do retailers Michael Kors ( KORS), which delivered a 49% increase in profits and a 23% increase in sales this quarter. Cramer said just about any stock that deals with mobile, social media or the cloud is growing like gangbusters -- which leads right to this week's Twitter IPO. Just a few weeks ago, Cramer noted, he was at the high end of the range, saying Twitter could be worth up to $20 billion. But today, despite nothing factually changing, $20 billion seems at the low end of the range, with some calling for valuations as high as $50 billion for Twitter. Cramer said that's a recipe for investors to get hurt, a la the Facebook ( FB) IPO last year. He cautioned that the big boys are betting big that uninformed investors will be willing to pay anything for shares of Twitter -- which is why he's once again reminding everyone there are prices at which every stock just becomes uninvestable. Cramer said he's willing to pay up to $28 a share for Twitter and not a penny more.