The Phrase 朋友 vs 朋友们 Since Chinese nouns can be both singular and plural depending on context (i.e. 牙齿), what is the difference between 朋友 and 朋友们.
Example:

我有很多朋友
我给我的朋友们说
我给我的朋友说
朋友们 is always being plural, while 朋友 can be either plural or singular depending on the context. 

我给我的朋友说 doesn't indicate if there is/are one/many friend(s).