For the past few weeks, Lauren Conrad has been busy traveling the world, promoting her sophomore book Sweet Little Lies and hanging out with long-standing boyfriend Kyle Howard. After wrapping up her tour Sunday, the ex-Hills star headed back to Cali and made a surprising stop at NASCAR's Sprint Cup in Los Angeles (not exactly the type of place we'd expect to find the glamourpuss!).
One thing's for sure: LC knows how to dress, no matter what the occasion. She looked effortlessly stylish (and NASCAR-appropriate) in this lightweight frock, paired with tousled hair and Ray-Ban Aviators. Check out these hot shots of her day of thunder, plus read her tweet below to see what she thought about standing on the sidelines.

