However, you could express the sentiment of "Live love laugh" in Japanese using a combination of Kanji, Hiragana, and Katakana:
生きる 愛する 笑う (ikiru aisuru warau)
* 生きる (ikiru) - To live
* 愛する (aisuru) - To love
* 笑う (warau) - To laugh
This is a more literal translation of the phrase. You could also use more poetic or figurative language to convey the same meaning in Japanese. For example:
人生を愛し、笑いながら生きよう (jinsei o aishi, warai nagara ikiyou)
* 人生 (jinsei) - Life
* 愛し (aishi) - To love
* 笑いながら (warai nagara) - While laughing
* 生きよう (ikiyou) - Let's live
Ultimately, how you express the sentiment depends on the context and the desired level of formality.