Syntax: This segment uses simple present tense ('broke down', 'going to make it') and contractions ('ain't', 'gonna') typical of informal, conversational English. 'That ain't my fault' uses non-standard grammar where 'ain't' substitutes for 'isn't'. 'We never going to make it' omits the auxiliary verb 'are' ('We are never going to make it'), which is common in very casual speech.
Morphology: The word 'ain't' is a contraction historically derived from 'am not', 'are not', 'is not', 'has not', and 'have not'. Its use here is morphologically simple but socially marked as informal or non-standard. 'Gonna' is a phonological reduction and morphological contraction of 'going to', indicating future intention.

Syntax: This is an imperative sentence. The subject 'you' is implied. 'Y'all' is a second-person plural pronoun common in Southern American English and informal speech nationwide. 'Chill' is used as a verb meaning 'relax'. 'For a minute' is an idiom meaning 'for a short time'.
Morphology: 'Y'all' is a contraction of 'you all'. 'Chill' has undergone conversion from noun/adjective to verb. The phrase 'for a minute' uses 'minute' not in its literal 60-second sense but as a count noun representing an indefinite short period.

Syntax: The structure uses the imperative mood ('Rock your body') for direct commands. 'Everybody' is a singular indefinite pronoun used with a singular imperative understood as addressing the collective. 'All right' (or 'alright') is used as an interjection of affirmation or excitement. The phrase 'Backstreet's back' uses the contracted form of 'Backstreet is back'.
Morphology: 'Rock' here undergoes semantic shift from its noun form (a stone) or musical genre to a verb meaning 'to move energetically to music'. The apostrophe-s in 'Backstreet's' indicates the contraction of 'is'. 'Alright' is an informal, fused spelling of 'all right'.

Syntax: 'Oh my God' is an exclamatory interjection. 'We're back again' uses the present perfect sense in a simple present structure to indicate a recently completed action with present relevance. 'Gonna' is used twice as the informal future marker. 'Better answer now' is an elliptical structure implying 'You had better answer now'.
Morphology: 'Brothers, sisters' are plural nouns used as vocatives to address the audience familiarly. 'Gonna' is a reduced form of 'going to'. The modal phrase 'had better' is reduced to just 'better' in this imperative context.

Syntax: Again uses the imperative mood ('throw', 'wave', 'let me hear'). 'Like you just don't care' is a simile introduced by 'like', functioning as an adverbial clause describing how to wave hands. 'Wanna' is a contraction of 'want to'. ''Cause' is a contraction of 'because'.
Morphology: 'In the air' is a prepositional phrase. 'Like you just don't care' uses 'like' as a conjunction, which is common in informal speech (where 'as if' might be used in formal writing). 'Wanna' and ''cause' are phonological reductions common in sung and spoken English.

Syntax: Uses past tense narrative ('I had', 'I was'). 'No way' is an interjection expressing disbelief. 'I was like...' uses the quotative 'like' to introduce reported speech or thought, a very common feature in informal English, especially among younger speakers. 'Had a trippy dream' uses simple past.
Morphology: 'Werewolf', 'Dracula', 'mummy' are all proper and common nouns referring to mythical monsters. 'Trippy' is an adjective derived from the noun 'trip' (associated with psychedelic experiences), meaning 'weird' or 'surreal'. The quotative 'like' has grammaticalized from its preposition/conjunction uses to introduce reported speech.