In honor of the holiday season, InStyle scoured the ranks of all your favorite stars (Ashley Madekwe, Rachel Bilson, and more!) in search of the most touching acts of kindness, and their answers will make even the Grinchiest Grinches smile. Solange Knowles likes to keep it simple: "I like to take the time out to compliment someone everyday, to smile and to open the door," Knowles told InStyle.com. "People really take a moment to appreciate it, which feels good." Be inspired to do something nice by clicking through the gallery to read more celebrity-inspired sweetness!