Meghan Trainor may not be a household name, but expect to be talking about the budding singer/songwriter more often as her star power rises thanks to the success of "All About That Bass." The song — which promotes being proud of your body, no matter what size — has been climbing the Billboard Hot 100 chart for weeks now, and finally, it's hit the no.1 spot. And that's not all: the Hot 100's top 5 is all ladies, which is definitely an awesome case of girl power! The Hot 100 top 5 just entered its whopping fifth week featuring all females, so let's keep going with the buzz-worthy pop tracks that make it up. #2 is being held by Taylor Swift's easy-breezy tune "Shake It Off, and sitting at number three is Iggy Azalea ft. Rita Ora's "Black Widow," which was originally written by Katy Perry, surprisingly. The no.4 spot belongs to the epic three-way duet "Bang Bang" by Jessie J, Ariana Grande, and Nicki Minaj, while rounding out at the fifth spot is Nicki's "Anaconda." Not bad, ladies. Can they all make it a sixth week in a row?