[In this weekly feature, Gamasutra rounds up the week's most popular paid and free iPhone and iPod Touch games, as current on the iTunes App Store.]

This week's top paid iPhone game titles on the App Store, as captured on July 18th 2011, are as follows:

1. Angry Birds ($0.99)
2. Tower Defense: Lost Earth ($0.99)
3. Fruit Ninja ($0.99)
4. Blobster ($0.99)
5. Angry Birds Seasons ($0.99)
6. Tiny Wings ($0.99)
7. Angry Birds Rio ($0.99)
8. Cut the Rope ($0.99)
9. Harry Potter: Spells ($0.99)
10. Words With Friends ($1.99)

Com2uS's Tower Defense: Lost Earth climbs to second place in today's results after debuting at seventh last week, as Angry Birds' multi-week chart reign continues.

Chillingo's recently released Blobster enters the top ten at fourth place, meanwhile, as Warner Bros' Harry Potter: Spells sees a sales boost in the wake of the recent theatrical release of Deathly Hallows Part 2.

Here are this week's top free iPhone games:

1. Draw'n Go: Awesomeness
2. Happy Theme Park
3. 2XL Supercross HD
4. Toy Balls
5. SuperRope
6. MapleStory: Thief Edition
7. Angry Birds Free
8. Cave Bowling
9. Racing Penguin, Flying Free
10. Hanging With Friends Free

AlphaWeb's physics puzzler Draw'n Go premieres as this week's top free iPhone download, leading over Happy Theme Park and 2XL Supercross HD.

Last week's chart winner Cave Bowling falls to eighth place in today's results, while Nexon's MMORPG spinoff MapleStory: Thief Edition claims sixth.