The term "perfect storm" is nearly synonymous with "worst-case scenario", although the latter carries more of a hypothetical connotation. "Perfect storm" has also been used as a metaphor for a relationship such as in the popular hit songs "Dark Horse" by Katy Perry, "Blank Space" by Taylor Swift, "Perfect Storm" by Brad Paisley, "Invincible" by Kelly Clarkson, and "Should've Been Us" by Tori Kelly. From the beginning, the phrase was in heavy use during the financial crisis of 2007–2008, even to the point of pundits anticipating "another perfect storm". The phrase was awarded the top prize by Lake Superior State University in their 2007 list of words that deserve to be banned for overuse.