Kylie Jenner with daughter Stormi. Picture: Instagram

There's a good reason why Kylie Jenner is one of the world's youngest billionaires. 

The woman knows how to make money. 

When she sees a gap to rake in those dollars, she get's working on it and makes it happen. 

Most of the project she touches does indeed turn to gold. 

Her current money maker is a range of Kylie clothing hoodies branded with the words "rise and shine" after posting a video of herself singing "Rise and Shine" to her daughter Stormi. 

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As soon as the video was posted it went viral with fans responding with funny "rise and shine" memes. 

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The memes sparked the idea to create the hoodies that are available in black and white. 

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What seems to be a very innocent business move, has no turned into a nasty battle of words. 

Has the 21-year-old business mogul claimed the words "Rise and Shine"? 

On Sunday she took to her Twitter account to deny rumours that her legal team had been in contact with a business in Australia over their use of the words "Rise and Shine" on their T-shirts.  

Why would she be apologising for something that hasn't happened though?

On November 1, MTV Australia reported that a small business owner on Australia's Gold Coast claimed she had received a letter from Kylie's lawyers asking her to stop selling clothing with the phrase 'Rise and Shine' on them. This despite the fact that the business has been selling such shirts for more than a year.

However, when the news started circulating on Twitter, Kylie responded, insisting: "Lies lies lies. Never did this. Wow."

This has caused a Twitter storm as tweeps responded to these allegations.