FiftyEight

I saw this video the other day, it's a chubby girl day dreaming about going to Barbados in her cubicle. There are a number of scenes where men who look outta of her league are all over her. One scene has her riding down the beach on a horse with a ripped guy. Cuts back to her office cubicle where she loses it on her coworkers, walks out the door and gets hit by a truck. I found it hilarious in a morbid sort of way but I have no idea the song or the words or anything and google searches haven't gotten me anything far.

Any help appreciated!