FreshPlanet’s Song Pop took the top spot on this week’s list of fastest-growing Facebook games by monthly active users, up by 1.1 million MAU for a gain of 141 percent.

Chinese-language role-playing game【猛將無雙】★★★★★ 超人氣!你的朋友都在玩 (“[Reggie unparalleled】 ★ ★ ★ ★ ★ super popular! Your friends are playing”) took the No. 2 spot, increasing by 22 percent with an increase of 135,927 MAU. SGN’s Jewels of the Amazon came in at No. 3 with 100,000 MAU, good for a nine percent gain. Manuel Otto’s Stick Run snagged the No. 4 position with 100,000 MAU, showing a relatively small increase of two percent in MAU. Finally, CrowdStar’s It Girl completes this week’s top five games on the list, also gaining 100,000  MAU for a two percent gain.

Aside from Song Pop, three other games this week had gains larger than 50 percent. BILD.de’s soccer game mein Klub was up by 50,000 MAU, a 500 percent gain that is likely due to the Euro Cup 2012. THQ’s UFC Undisputed Fight Nation brought in 30,000 MAU for a 50 percent increase — again probably because of several recent, high-profile UFC fights, as well as the recent announcement that Electronic Arts had acquired the video game rights to the franchise. Finally, IGG’s 泰坦戰爭-首款3D大型網遊,全新引擎,史詩大作,超震撼視覺感受,遊覽眾古文明!★★★★★ (“Titan war – the first 3D large-scale online games, new engine, epic masterpiece, super stunning visual feelings, to visit all the ancient civilizations! ★ ★ ★ ★ ★”) snagged 20,000 MAU for a 67 percent gain, likely due to cross-traffic from its recently-launched Facebook MMO Moonlight Online.

Clarification: Jellyvision Games’s trivia game You Don’t Know Jack didn’t appear on this list due to a classification error on AppData; it would have taken the No. 3 spot with 130,000 MAU for a 325 percent increase. The error’s been fixed and the game will show up on future charts.

Name MAU Gain Gain,% 1.  Song Pop 1,900,000 +1,110,000 + 141% 2.  【猛將無雙】★★★★★ 超人氣!你的朋友都在玩 745,927 +135,927 + 22% 3.  Jewels of the Amazon 1,200,000 +100,000 + 9% 4.  Stick Run 5,000,000 +100,000 + 2% 5.  It Girl 1,300,000 +100,000 + 8% 6.  Top Eleven be a Football Manager 4,600,000 +100,000 + 2% 7.  FarmVille 21,500,000 +100,000 + 0.47% 8.  Bingo Bash 2,200,000 +100,000 + 5% 9.  Angry Birds 220,000 +50,000 + 29% 10.  mein Klub 60,000 +50,000 + 500% 11.  Foto Memória 330,000 +40,000 + 14% 12.  UFC Undisputed Fight Nation Game 90,000 +30,000 + 50% 13.  Ninja Soul 210,000 +30,000 + 17% 14.  Lucky Bingo 400,000 +30,000 + 8% 15.  Guitar Hero III 130,000 +30,000 + 30% 16.  World War 120,000 +20,000 + 20% 17.  泰坦戰爭-首款3D大型網遊,全新引擎,史詩大作,超震撼視覺感受,遊覽眾古文明!★★★★★ 50,000 +20,000 + 67% 18.  Dice with Buddies 440,000 +20,000 + 5% 19.  Card Ace: Casino 200,000 +20,000 + 18% 20.  iMobsters 90,000 +20,000 + 29%

All data in this post comes from our traffic tracking service, AppData. Stay tuned for our look at the fastest-growing games by daily active users later today and top emerging apps on Friday.

Read our reviews of…

• Song Pop
• Stick Run
• Jewels of the Amazon
• UFC Undisputed Fight Nation
• Angry Birds Friends