It's been an eventful week for Lady Gaga. In fact, there's so much going on that we're bringing you a special catching-up-with-Lady-Gaga rap sheet, chronicling the good, the bad and the downright weird in the life and times of Her Ladyship.

High point: Lady Gaga appears to have casually dropped in for Britney Spears' Femme Fatale tour stop in Atlantic City on Saturday night. Spears gave her a shout-out from the stage, and Gaga popped up above the masses to greet fans in her as-per-usual uniform of leather newsboy cap and black bustier. Watch Gaga's cameo after the jump.

The New Jersey show was just a routine stop on Spears' summer jaunt with Nicki Minaj. Which brings us to the real question: With Gaga, Britney, and Minaj all in one arena, how is it still standing (and is there any body glitter left in southern New Jersey)?

Low point: Rebecca Francescatti, a Chicago-based singer, is suing Lady Gaga for allegedly stealing "substantial, original portions" of her 1999 song "Juda" (recorded with her band Rebecca F. & the Memes) for use in her own release "Judas," according to papers filed by a district court in Illinois. Ah, but the plot thickens: Brian Gaynor, a sound engineer and bassist who worked with Francescatti on "Juda" also worked with Lady Gaga on her 2011 release Born This Way. Justified? Several videos that compare the two songs have surfaced on YouTube—have a listen and decide for yourself.

… Uh, what? Point of no explanation: Gaga tweeted digital images of the bizarre cover art for her single "You & I" on Friday. They feature Lady Gaga dressed in uncomfortably convincing drag: Her male alter ego, named "Jo Calderone," is a black-haired, impressively mutton-chopped man sucking on a cigarette (and, according to an article in an issue of Men's Vogue in Japan last year, is a Sicilian car mechanic). "You will never find what you are looking for in love, if you don't love yourself," she wrote in the tweet.

What do you think, Music Mix followers? Where will the Gaga rollercoaster take us next—new highs, or new lows?