A light novel about a cold FL who was in an accident and was reborn 3 years before her death. She found out who was behind her death and looks for revenge; at the same time, she decides to spoil her husband who was the one by her side during her time in the hospital after the accident. I remember she tries to make her husband smile 10 times and her husband is a famous actor.
It's not that but the title helped me find the novel I was looking for since the titles were similar. Thank you!
https://www.novelupdates.com/series/rebirth-of-the-film-emperors-beloved-wife/ Pretty sure it's the right one. Just left off rebirth.