Lunde made her debut on the Norwegian national team in 2002. She is a four-time European champion (2004, 2006, 2008, and 2010). She is World champion from 2011, received a silver medal at the 2007 World Women's Handball Championship, and a bronze medal at the 2009 World Championship. In August 2008, together with her twin sister, she won the gold medal at the 2008 Summer Olympics in Beijing. She was selected into the tournament's All-Star Team, and was also overall top goalkeeper with a 42% save rate.