"Little Do You Know" is a popular cover song by Annie LeBlanc (now known as Jules LeBlanc) and Hayden Summerall, originally performed by Alex & Sierra. Released in 2017, it gained massive traction on YouTube with over 67 million views for their music video. The duet captures themes of hidden heartbreak and enduring love in a pop ballad style. The song features emotional verses from Annie about inner turmoil, like "Little do you know / How I'm breaking while you fall asleep / I'm still haunted by