In the pilot, Rayna telling off her boss after he pressures her to play second fiddle to Juliette. "You can kiss my decision as it's walking out the door."
Juliette buying off a photo of Sean from a paparazzi (a picture that wouldn't have affected her at all)
Rayna and Juliette's duet, with a song they wrote together. Despite their distaste for each other, they're able to be professional and give an epic performance (which also makes it a real life Moment Of Awesome for Connie Britton and Hayden Panettiere).
Teddy standing up to Lamar when he threatens to expose that Deacon is Maddie's birth father. It's literally the best thing that he's ever done.
Gunnar dropping Avery to the floor with three quick punches.
Juliette laying down the law to her staff — specifically her soon-to-be-ex-manager. A lot of fury in a tiny frame.
Lamar going Papa Wolf on Teddy after the divorce starts. "An oath. Kind of like a vow, isn't it?"
Avery burning the masters of the tracks Dominic recorded. He knew he could potentially destroy his career and did it anyway because he wanted to be true to himself.
Deacon telling off Dante after the latter fires Avery. He has no reason to stick up for him since he is no longer dating Scarlett and does it anyway.
Jolene killing Dante. Her actions after make it less awesome though.
Lamar squashing his daughter's attempt to kick him off the board simply by showing up in the room. Suddenly no one wants to turn on him when he's actually there to fight back.
Rayna sticking it to her new boss by using a concert he forced her to attend to announce she's forming her own record company.
Juliette persuading Charlie Wentworth to rehire a DJ (who likes to perv over young singers) that he fired for belittling her in favour of Layla... and then telling said DJ that if he gets up to his old tricks again she'll have him fired permanently (in addition to getting more airtime for herself). You don't mess around with Miss Barnes.
Jeff has one when he tells Layla that he will drop her if he finds out she leaked a rumor about Juliette to the press. One can only hope he follows through on this.
"It's All Wrong, But It's All Right" features back-to-back Moments Of Awesome for Juliette; first by refusing to apologize to the religious bigots who have been wrecking her career (and doing so in musical form to boot), and then giving Jeff a much-deserved "The Reason You Suck" Speech telling him that she may have just torched her career, but also took him down a few pegs in the process (as she points out, losing two of his biggest acts in his first six months running a record label - Rayna quit and Juliette was dropped - isn't the smartest thing to do).
Concurrent to this, one for Glenn, who tells Jeff he didn't know she'd do it...and if he did, he'd have advised her to a) call Jeff out by name and b) suggest he perform an anatomically impossible bowel function with the TelePrompTer.
Teddy prompting Lamar to have a heart attack by informing him it was really his own daughter who betrayed him, then coldly watching him die.
Scarlett calling out her mother for a lifetime of emotional and physical abuse, through song.
Michelle Obama's guest appearance, introducing a concert at a military base.