Answer based on context:

In its first week, Pikmin sold more than 101,000 copies. However, sales fell to only between 10,000 and 15,000 copies in the weeks following. Following the release of "Ai no Uta (Strawberry Flower song)" by Strawberry Flower, an image song related to Pikmin, its sales recovered slightly to about 22,000 copies in a week. The song appeared in the Japanese commercials for the game, but soon became an unexpected hit song, eventually eclipsing Pikmins sales. In the weeks of December 24, 2001 and January 6, 2002, Pikmin sold approximately 53,000 copies and 102,000 copies respectively. To date, Pikmin has sold approximately 1.19 million copies worldwide; 680,000 in the United States and 507,011 in Japan. By January 3, 2010, the Wii version of Pikmin has sold 169,036 copies in Japan. Since its release, Pikmin has developed a vocal and devoted fanbase.

Which sold more copies in the weeks following release, Pikmin, or "Ai no Uta"?
"Ai no Uta