It looks like someone took a compromised Twitter feed and turned it into a fake CNN account, which was peddling weight loss spam:Capital "I" where the L should be.
Scammers will often try to fool potential victims with almost-but-not-quite usernames in exactly the same way they would with fake banking pages so always be on the lookout for that old but effective trick. The Twitter feed in question has had the spammy links removed, though it still claims to be CNN.
As for the shortened Goo.gl link, it leads to the below site offering up a "free trial offer for readers":6 / 50.
Always look for the verified badge on a Twitter profile if it claims to be a popular news station, TV show, musician or anything else. While a verified account can still be hijacked to send spam, it's probably at least a good idea to be looking at an official profile if and when fur starts to fly. L
et's not make it easy for the scammers by using any old profile as the jump-off point for dubious link clicking - look how many retweets one of the diet links received from people who likely thought it was a real CNN account before it was taken down: