Gravity vs The Girl is the first of Riley Noehren's novels, and also up for Best General Fiction.
From the back cover blurb:
Samantha Green has just spent an entire year in her pajamas, and she is beginning to regret it.
What's more, she is haunted by four ghosts that are former versions of herself. First up is the overachieving and materialistic attorney, who is furious with Samantha for throwing away the career she worked so hard to build. Second is the lackadaisical college student who is high on life but low on responsibility. Next is the melodramatic teenager, who is consumed with her social standing, teal eyeliner and teased bangs. Finally, there is the scrappy six-year old, whose only objective is to overcome gravity so that she can fly.
Samantha's ghosts alternate between fighting with each other, rallying around Samantha's budding sanity and falling in love with a string of good-for-nothing drummers. Despite her reluctance to do so, Samantha must rely on these spirits from the past to repair the present and ensure her future.
You can learn more about Riley on her website or her blog.